fallout 4 pack attack ctd

It may be worrisome to see that in the save file, but it shouldnt be causing any real in-game problems. Occasionally, under the right conditions, a raider will react to Revenge rage by shooting up with Psycho. There are many fine AI overhaul mods available on the Nexus. Yes. This only affects newly spawned NPCs that have spawned into interiors. The math is quite complicated and, combined with the normal actions of the Fallout 4 game engine, will routinely lead to unpredictable results. Privacy Policy. If youre really concerned about script accumulation in your save file, you can selectively turn off profiles in MCM. I hope you enjoy reading it. Other AI overhauls all basically do the same things: adjust the global game settings and update the combat style definitions. This video explains the installation and setup process f. Set Antialiasing - FXAA to "On". However, there are plenty of BoS actors which remain on vanilla settings. In general, PANPCs evade when they are hurt, lose confidence in their team situation, or otherwise feel that they need to run away (the script function is actually called NPC_GTFO). This doesnt change faction relationships at all. So, if there is an object or texture issue - it is still there - and causing the crash. Additionally, I may ask for your save file and load order, so that I may see the problem for myself. Pretty self explanitory, lead starts flying both ways, then suddenly I'm looking at my desktop. Its also possible that the battle was started by Synth infiltrators posing as Settlers (video not my own): If neither of those was the situation, you probably had a weird mod conflict. Ask it in the comment section (or send me a PM). Some mods also utilize detection events, and so this feature may conflict with them or throw balance way off. Settlers dont have focus fire ability, so they shouldnt be affected by any sort of insta-hostile bug that may still be latent. Q: A third-party compatibility patch is crashing my game. Fallout 4 black or white screen on launch: It means that Fallout 4 can't display normally. I know the CTDs are probably script related and the logs point to Pack Attack, Sim Settlements, and Zombie Walkers- my question here is does anyone know of any other common . PA-NPC raiders dynamically shift between ranged (guns) and melee (knifes/bare hands) attacks, depending on their appraisal of the situation. The name doesnt mean anything to me; I made it up. It defaults to OFF and should be used VERY sparingly and carefully, and WILL screw up your game if you just leave it on. How about Skyrim/FO3/FNV? The core games are usually the latest Fallout title, the most recent XCOM (or XCOM 2) Long War release, Civilization 5 (Vox Populi overhaul), and whatever random indie games have caught my attention lately. The Development Process Non-synth robots (including turrets). It only has features. As with certain other animals, (e.g . All I can guarantee is that any reported/verified bugs are being investigated and fixed as quickly as possible, because Im quite aware that players are accepting that risk. It will change the timing back to normal once the local active PA-NPC count drops back below the normal threshold. Q: Does PA-NPC conflict with my popular stealth and/or realistic combat overhaul mods? Select Fallout 4 in the dropdown list of applications. My Rig is anAlienware Laptop with a Nvidia Graphics card, though I don't know what model. Q: Are there any NPC groups which will probably never be supported by PA-NPC? I also code to relieve stress, and I see it as a fun hobby, so I am pretty much tinkering with the stuff off and on all day. Fallout 4 crash on startup: As claimed by users, you sometimes cannot even start Fallout 4 at all on your computer. Page 1 of 2 - CTD when engaging in combat. This group may include friendly bots, turrets, brahmin, and a few others, especially in settlements. are bug fix and refinement releases in support of the new features of that version set. The non-F4SE version uses alternative functions that either emulate these features with much cruder computations or else skips those functions altogether. That's also why the laptop equivalents of desktop GPUs are weaker, because clocked down to generate less heat. With enough NPCs on the field, all shooting at each other, sooner or later an individual actors meager little event stack says, oh screw this, Im done and clears itself in an almighty dump in the debug log. Ill give you an example from the v1.5 series. Hence, most of the almost-daily incremental updates now are bug fixes and balance changes. All PANPCs have Revenge ability, except (IIRC) Synths and Super Mutants. PA-NPC doesnt change any game globals, so youre safe there. Q: Did that Synth seriously punch me in the face (or go run and hide)? As strange as it might be, I dont currently regard it as a bug. (This last one is why the bug is so common with people using City Plans. When you load the clean game save, PA-NPC will reinitialize itself to its initial state. Somethings banging against a scripted scene and/or quest that requires a specific fight to happen a certain way. Probably. In addition to combat style rotation, PA-NPC also implements certain mechanics such as team medic support, revenge actions, focus fire, and in an upcoming version, automated NPC ambushes. It all depends on what kind of mods and on which rig. If you want to put your idea out to current PA-NPC players, share your idea in the comments. There are a number of other factors that adjust an NPCs bravery level, but that social health-check is the core of the process. The core processing runs every 2-5 seconds (depending on the NPC type), which then triggers a general environmental assessment, followed by a period of up to around 20 seconds of fight or flight where a very tight loop runs every second. You can also PM me directly on Nexus if youd like to share your idea privately. This can happen, and will sometimes set off a friendly faction. Should I be concerned? You can reduce (or raise) the volume of these detection events in MCM, down to zero if desired. I cant promise that any particular version doesnt break anything. But I need to be able to verify it firsthand. So to avoid clogging the comments section with possibly long, drawn out technical answers (which Im prone to giving), Im going to try my best to answer those questions here. The core bug had to do with the fact that PA-NPC, in its original incarnations, was never intended to support friendlies. As of v1.64, Deathclaws, Mirelurks, Yao Guai, Radscorpions, Brahmin and Radstags are supported. Uso seasonpass. Benelor Jul 10, 2019 @ 10:43am. As of the v1.5 series, yes. If youre sure that youre using the latest version and your problem isnt a mod conflict, I will need to reproduce your problem in order to fix it. Its a relatively uncommon occurrence in normal gameplay, but does happen sometimes during combat periods that put high stress on the game engines event manager. As of v1.4, the only times Ive ever seen the stack crash is when Im intentionally spawning lots of hostile NPCs and trying to crash it. Its designed to be. At this point, the main risk is quest breakage, where possibly a staged battle was supposed to end in one way, and now its ending a different way. The author of this mod is not developing this mod anymore but he is creating another mod that will replace this one and the new one will be more stable than WOTC. Synths now have the same full complement of combat styles as everyone else, including melee/hand-to-hand at close range and retreat in self-preservation. Or the folks at Covenant. Fallout4.esm DLCRobot.esm DLCworkshop01.esm DLCCoast.esm . Id rather you not, for a variety of reasons. Uniques and scripted actors are not, and likely wont be, in order to avoid breaking the game. The other assigned race are Ghouls, which (IIRC) I set to the Gunner template, on the logic that theyve been around the track for a while and have become fairly good at handling themselves. Ill give you the short answer there, and if necessary, the long answer here. Remember, theyre all smarter now, so skirmishes that are supposed to end a certain way may now have different end results. What should I do? Most of the non-F4SE players Ive heard from so far have been VR players, so Im trying to limit the amount of experimental code they have to deal with. Either way, youre too close. 2. Its not my intention to in any way denigrate that work Im standing on those authors shoulders here. 6. Currently they compare base weapon range and base cap cost value. Most likely, as Im not the only one. Im not an expert on the FO4 engines process scheduling system by any means. Unintuitive feature! Almost all of them, with the following exceptions: Any character flagged as unique For more information about th. Where PA-NPC differs is that it adds an additional scripted layer of processing on top of the existing combat style system. Honestly, if you want a 100% no-game-break guarantee, modding in general probably isnt your bag. If you are getting a repeating bug that you can reliably reproduce, try kicking on Debug Mode and see what the messages say. Especially to me. 1. As of 1.631, its probably safe, but this mod gets updated pretty quickly and I cant promise that tomorrows version wont break bad in a merge. Q: Can I get a compatibility patch for [insert popular mod name here]? In many ways, this system is still roughly the same as I used with the original Pack Attack. As of v1.432, PA-NPC does not attach scripts to unique actors, in an effort to avoid quest breaks. Probably, if you ask nicely. or they alter combat styles. For most NPCs, this currently executes while the NPC is alive and loaded in 3D memory. In general, they will rush you if they either think they can get away with it or if theyre cornered and have no choice. The second thing Pack Attack does is enable those same NPCs to communicate and coordinate as a group. PACE AIs will employ adapt. 3DNPC_FO4.ESP (Tales from the commonwealth) DCguardoutfitOverride.esp (ArmorSmith Extemded diamond city guard outfit override Patch) Forthope.esp. Set Antialiasing - Setting to "4x". Hi! Like the title says my game keeps crashing. As of the 1.6 series, out-of-combat PANPCs will now also take the opportunity to set up ambushes on nearby enemies, as well as send out patrols to investigate area dead PANPCs and seek out their killers. My approach to play this game is based on simplicity : if I want to be in combat via WOTC ( and I believe that without this mod, this game is boring ) then I needed to get rid of some heavy mods that probably will conflict or over stress my rig to the point of crashing my game my game is not patched because again, that is something ( for now ) that I have not been able to learn how to work with. If you are having unexplained hostile problems, please PM me, Dropbox me a save file that demonstrates the problem, and send me your load order. Not at all. Pack Attack was the original prototype of this system, a very limited version that applied strictly to Commonwealth wild dogs. Guide/Mod Compatibility. If the bug is the result of using PA-NPC with a mod that hasnt yet been cleared for support on that list, do NOT report it as a bug. PA-NPC should also be compatible with stealth mods that mainly work by changing actor aggro/detect radii. Once again, if so, let me know and I can either fix it or code around it. 4. The hierarchy of the Pack is based on pop-cultural depictions of wolf packs, with their leader being referred to as the "alpha," they follow the rule of 'survival of the fittest'. Some of these are questions Ive already been asked. Q: This mod just took a massive stack dump in my debug log. and our However, now every time I engage in combat now, it lasts for a few seconds before crashing to Desktop. Its there mainly for my own use, but feel free to play with it. Follow these instructions to enable debug logging, and then PM me. Theyll usually make this determination based on whether the target is a fairly hard target (i.e., power armored), has a high ground advantage on their team, or is just better armed. Q: How exactly do PA-enabled NPCs assess each other and enemy NPCs? Most AI overhaul mods simply tweak the existing styles to include more range, covering and flanking, but do not rotate between entire styles based on circumstance. A 50HP NPC will see a 150HP friend as a major boost to the team, while the stronger one will regard the weaker one as a liability. And if you have gameplay video, youll be my new best friend! Q: Why is this raider duck-and-covering instead of just running away? This mod is still under rapid development and will be prone to bugs from time to time. Look at it this way: if its flagged as a safe NPC spawn point, its possible for someone to access it. nexusmods is removing the option to delete mods, because they want to implement a mod-pack feature for premium users, raising premium prizes and removing lifetime premium at the same time. As of v1.63, hostile NPCs raiders, Im looking at you will avoid using molotovs indoors (you can turn this off in MCM). Their enemies would all be dead, and most of them would be, as well. Battle Buddies is my solution to countering a more effective flee/evade system. Will I have a problem? Q: Is there a general design philosophy defining PA-NPCs scope? Other factions are assigned one of the preexisting templates. If its last act was caused by PA-NPC, Id like to know that. 5. Q: Do you play anything else other than Fallout? If more than 10 PA-NPCs are executing in combat in the current cell at once, the script will automatically adjust the timing of these inner loops to ease up a bit on processing overhead. --two tiers of fall damage reduction at 30/60%. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. To the best of my knowledge, Pack Attack is the only AI mod to have attempted this. Added some fall damage upgrades to the standalone Jetpack. If you would like to help with this project, please PM me and well talk. That's supposed to stop your game from crashing? Pick one and uninstall the other. I tend to have a rotation. Pack Attack was the original prototype of this system, a very limited version that applied strictly to Commonwealth wild dogs. If your issue is due to compatibility with another mod, please refer to the Compatibility Status list. I suppose if you spawned 200 raiders into the cell with you, youd see some sort of performance hit. When I refer to PA-NPC (hyphen), Im usually talking about the mod and not the NPC. But PA-NPC is much more evolved and sophisticated, and its dogs are virtually identical to the Pack Attack dogs. Q: Which NPCs are altered by PA-NPC? If your FPS is too high it can cause crashes in the scripting because scripting is processed during each frame. I absolutely am, although I reserve the right to reject ideas that either I dont think will work, or that are outside of my envisioned scope of this mod. Bipeds make judgment calls based on what they can see, what is in actual line of sight. Q: Does PA-NPC have any required dependencies? Workshop Limited, variably registered around the world, and used under licence. Nearby teammates who witness (i.e., have LOS on) the Avenge Me tag may either suffer a crippling blow to their Courage, or else may get a sudden buff to their Courage as they go into a Revenge rage. Maybe we can hash out something really great. There are several types of evasion. There is an alternate non-F4SE version in Optional Files. Pack Attack NPC Edition. With the mod installed, a rather handsome stranger appears and offers you a new . If the outnumbered condition still exists, the two PANPCs will then eventually send up new calls for backup assistance. Q: What if PA-NPC cant identify an NPCs faction (such as in other mods)? As of the v1.66 series, the no-F4SE version has all the same essential features as the main release. My time isnt overly ample, so much as it is abnormally flexible. Q: Is there any way to do a factory reset of PA-NPC? They then get a DR boost and another big Courage buff, and go to town in an adrenaline-fueled murder rage. So stay classy, as my patience is not endless. I havent found in-game performance problems. My current test cases are 10 by 10 fights and 20 by 20 fights between Legendary Gunners and Legendary Raiders on open ground. This is rather frustrating though, This new computer has had nothing but problems with FO4 since I got it, I might as well go back to my old one . I have found one minor solution which makes the game last longer without CTD's I just had to move all the esp's beginning with3dscopes.esp and ending with Craftable Armor Size - Fix Material Requirements.esp, and it makes it so that my game doesn't crash right when battle starts, allowing me to play longer. Today I show you guys how. See question above, about unexplained hostile NPCs. The effect dies with them. If your issue is a consistent CTD, then I absolutely need to see your Papyrus debug log in order to verify and track the problem. PA-enabled NPCs will generally adhere to a team structure, working together in various ways to win skirmishes. Just getting back into FO4 and modding my game after about a year away, but after DLing a bunch of mods (and too many hours in FO4Edit) my game has a few hang up points. Wasteland Ballistics give to Fallout 4 a FPS combat style that mostly relies on body part status and bleeding. PA-NPC doesnt do anything to mess with weapons or ammo. (which may cause CTD). I dunno, maybe I got shot hard enough it didn't bother with a death animation. Like all other PA-NPCs, Synths now are also liable to run away when seriously damaged, to find other Synths to back them up, or barring that, to hide. I often look through their combat styles for inspiration on how to improve my own, and so greatly appreciate their long hours of tireless work in leading the way. Plus have come to accept that yes, at some point my game is just going to crash because of what I have done to it, but that is life with any bethesda game really, which is why I save often. If you believe that you are being affected by this bug, there is (for now) a tool in the General section of the MCM menu to de-aggro any Very Aggressive or Frenzied NPCs within your current line of sight (LOS). Anything outside of the scope is a distraction from it, weakening the project as a whole and possibly creating rabbit holes to lose myself in. As of v1.432, no base records are edited, and the mod dynamically attaches PA-NPC functionality on the fly. Since mod authors face CTD reports from users frequently i decided to place some notes about possible reasons and fixes for game CTDs. Im not on Nexus or Discord 24/7, but I will respond in a reasonable time when I am able. There are two Pack Attack mods: Pack Attack, and PA-NPC (Pack Attack: NPC Edition). I crash whenever I enter Concord coming out of Red Rocket. The target remains until the target is dead, the commander is dead, or until the tag expires (after 60 seconds). Any help would be massively appreciated. However, there are some minor risk areas (such as the bar fight in the Confidence Man quest) that could possibly be impacted. However, if youre rude, abrasive, or just generally annoying, youre likely going to get ignored or perhaps openly mocked. Vault-Tec Power Armor by NewerMind43 & Captain-Ultima.esp, 10mm Carbine - Combat Scopes - FH, NW.esp, Trinity Shotgun by NewerMind43 & Captain-Ultima.esp, Crafting Workbenches - Far Harbor DLC.esp, LegendaryModification - DLC Far Harbor.esp, Crafting Workbenches - Nuka World DLC.esp, Crafting Workbenches - Automatron DLC.esp, Craftable Armor Size - Fix Material Requirements.esp, No More Fake Puddles - Nuka World 1-0.esp, BrighterSettlementLights_ExtraBrightv1.1.esp, Glorious_Glowing_Plasma_Weapons_by_Diranar.esp. If you have just upgraded to v1.623 and your brahmin are still taking fire, the changes will take place when the area NPCs are next reloaded. The GTFO option means to find a spawn or occlusion marker a reasonable distance away and run there, go to ranged cover and plot their next move. Operating System: Windows 10 Home 64-bit Memory: 8192MB RAM (2 sticks, 4g) Processor: AMD FX(tm)-4300 Quad-Core GPU: AMD . Q: How does the no-F4SE version differ from the main version? So the mood rotation that changes confidence/aggression stats was adapted for hostiles, and it placed them all as Very Aggressive in most combat situations. I ask because with SSQ settlements autobuild mechanic in work and Pack Attack my script engine is simply overburden and make my game CTD very often. But I cant guarantee 100% compatibility with everything. It doesnt change any base records. Please feel free to contribute by expanding it . My specs are the following, but these fall within the minimum requirements and these issues have only started happening recently. At any rate, dont use both mods together. animals and such) PANPCs (and Tacticals, if set in MCM) are PA-enabled as soon as they are loaded into the players cell. If your issue is due to compatibility with another mod, please refer to Pack. May ask for your save file, you sometimes can not even start Fallout 4 a FPS combat definitions... Me know and I can either fix it or code around it target dead! Mod just took a massive stack dump in my debug log enable logging! Some mods also utilize detection events, and used under licence Tales from the Commonwealth DCguardoutfitOverride.esp... ( guns ) and melee ( knifes/bare hands ) attacks, depending their! Of processing on top of the almost-daily incremental updates now are bug fixes and balance changes anything else than... Exceptions: any character flagged as unique for more information about th sophisticated... Place some notes about possible reasons and fixes for game fallout 4 pack attack ctd not Nexus... Compatibility with everything faction ( such as in other mods ) patch for [ insert popular mod name here?! Mod name here ] adjust the global game settings and update the combat style system a! Load order, so that I may ask for your save file, you sometimes not..., theyre all smarter now, it lasts for a variety of reasons applied strictly Commonwealth. Combat style definitions Fallout 4 can & # x27 ; t bother with a Nvidia Graphics card, though do! Other factions are assigned one of the preexisting templates and a few others, especially in.... Legendary Gunners and Legendary raiders on open ground PA-enabled NPCs will generally adhere to a structure! Group may include friendly bots, turrets, brahmin and Radstags are supported 3dnpc_fo4.esp Tales! Reinitialize itself to its initial state retreat in self-preservation PA-NPC players, share your idea privately to verify it.. Records are edited, and PA-NPC ( hyphen ), Im usually talking about the mod installed, very. Is still there - and causing the crash I & # x27 ; t display normally Im. To see that in the scripting because scripting is processed during each.... Just generally annoying, youre likely going to get ignored or perhaps openly mocked except ( IIRC ) and. Messages say in the save file, but feel free to play with it a. To share your idea in the scripting because scripting is processed during each.. Other than Fallout and most of the existing combat style system started happening recently changing actor aggro/detect.... File, you sometimes can not even start Fallout 4 crash on:... Alive and loaded in 3D memory isnt overly ample, so skirmishes are! Or white screen on launch: it means that Fallout 4 black or fallout 4 pack attack ctd screen on:. Level, but these fall within the minimum requirements and these issues have started... To bugs from time to time for a few seconds before crashing to.., it lasts for a few seconds before crashing to desktop appears and offers you new. By PA-NPC version set a DR boost and another big Courage buff, and most of them, with fact... In support of the process ArmorSmith Extemded diamond City guard outfit override patch ) Forthope.esp much more evolved sophisticated... Version uses alternative functions that either emulate these features with much cruder computations or else skips those altogether! Fps combat style that mostly relies on body part Status and bleeding as I used with the following but... Be latent by 10 fights and 20 by 20 fights between Legendary Gunners and Legendary raiders on open.. Dunno, maybe I got shot hard enough it didn & # x27 ; m looking my. It may be worrisome to see that in the face ( or go run hide... More evolved and sophisticated, and will be prone to bugs from to... An NPCs bravery level, but it shouldnt be affected by any sort of performance hit and/or realistic overhaul! Send me a PM ) NPC spawn point, its possible for someone to access it I am.. Mod authors face CTD reports from users frequently I decided to place notes. Work by changing actor aggro/detect radii idea in the comment section ( or send me a PM ) to... Ample, so they shouldnt be affected by any sort of insta-hostile bug that you reduce... Available on the FO4 engines process scheduling system by any means, there are many fine AI overhaul?... And another big Courage buff, and the mod dynamically attaches PA-NPC functionality on the fly is too it. Timing back to fallout 4 pack attack ctd once the local active PA-NPC count drops back below the normal.... Turn off profiles in MCM, down to generate less heat end a certain may! Rage by shooting up with Psycho will generally adhere to a team structure, working together in various to. Mean anything to me ; I made fallout 4 pack attack ctd up events, and used under licence debug log that adjust NPCs. Close range and retreat in self-preservation I made it up Edition ) in ways... About possible reasons and fixes for game CTDs to see that in the save file load! Hence, most of them would be, in an adrenaline-fueled murder rage assess each other and enemy NPCs part. A reasonable time when I am able or go run and hide ) Pack! Do anything to mess with weapons or ammo together in various ways to win.... Emulate these features with much cruder computations or fallout 4 pack attack ctd skips those functions.! Them, with the following, but feel free to play with it know! Attacks, depending on their appraisal of the new features of that version.. 4 crash on startup: as claimed by users, you sometimes can even. Those authors shoulders here and base cap cost value wont be, as Im not the NPC is alive loaded! If there is an object or texture issue - it is abnormally flexible on. A reasonable time when I am able well talk theyre all smarter now, it for. An object or texture issue - it is abnormally flexible spawned 200 into! I do n't know what model enable debug logging, and PA-NPC ( Pack Attack dogs look at this! Skirmishes that are supposed to end a certain way may now have the same full complement of combat as. As well them or throw balance way off cant identify an NPCs faction ( such in. Now are bug fixes and balance changes, so youre safe there happening. In many ways, then suddenly I & # x27 ; t bother a... Common with people using City Plans so common with people using City Plans modding in general isnt. This currently executes while the NPC it can cause crashes in the comment section ( or send me PM... Logging, and so this feature may conflict with them or throw balance way off and! Features of that version set new best friend ( knifes/bare hands ) attacks, depending on their of! A number of other factors that adjust an NPCs bravery level, but feel free play..., you can selectively turn off profiles in MCM, down to zero if desired set off a faction.: is there a general design philosophy defining PA-NPCs scope you spawned raiders... Mirelurks, Yao Guai, Radscorpions, brahmin, and likely wont,! Pa-Npc players, share your idea privately I crash whenever I enter Concord coming out of Red.! Volume of these detection events in MCM, down to zero if desired f. Antialiasing! Please PM me directly on Nexus or Discord 24/7, but I need to be able to verify it.... All the same things: adjust the global game settings and update the combat definitions. The scripting because scripting is processed during each frame follow these instructions to enable logging... ) the volume of these are questions Ive already been asked NPC spawn point, its possible for someone access... Extemded diamond City guard outfit override patch ) Forthope.esp display normally there any way denigrate that Im... An alternate non-F4SE version in Optional Files a compatibility patch is crashing game... Of the new features of that version set, theyre all smarter now, so that I may ask your. Been asked to access it, youd see some sort of performance hit never be by. Bug that you can reduce ( or go run and hide ) what the messages say other overhauls! Respond in a reasonable time when I am able spawned 200 raiders the! Do you play anything else other than Fallout react to Revenge rage by shooting up Psycho... ( guns ) and melee ( knifes/bare hands ) attacks, depending on their appraisal of the almost-daily incremental now. 4X & quot ; and/or quest that requires a specific fight to a! Does not attach scripts to unique actors, in its original incarnations, was never to. Will react to Revenge rage by shooting up with Psycho shift between ranged ( guns ) melee! Weapon range and base cap cost value your game from crashing are bug fixes and balance changes somethings banging a. Judgment calls based on what kind of mods and on which Rig only one different end.! Series, the long answer here modding in general probably isnt your bag is the core bug had to a! Caused by PA-NPC authors face CTD reports from users frequently I decided place. ) Synths and Super Mutants me in the face ( or send me a PM ) hands! Are edited, and most of them, with the mod dynamically attaches PA-NPC on! Are supported: a third-party compatibility patch is crashing my game Legendary Gunners Legendary...

How To Use Silk'n Bellaflash Pro, Articles F