wip Real-Time Body Physics (DirectX 11)

[jeno3]

Hi and thanks for the update.

 

The butt physics still has glitches, so I've disabled it. The physics settings window looks different for me, I have no idea why. For you, it looks like you can adjust it using the sliders. I can only click in there and the value changes upwards, but not downwards.

 

 

[jeno3]

Just now, jeno3 said:

Hi and thanks for the update.

 

The butt physics still has glitches, so I've disabled it. The physics settings window looks different for me, I have no idea why. For you, it looks like you can adjust it using the sliders. I can only click in there and the value changes upwards, but not downwards.

 

 

I was a little surprised. Some of the files in your mod folder are older than mine. I've now taken all the files from your last mod folder, but mine were newer. I'm sending you two pictures. The first shows how I'm running it now after your update, since you attached the files. The second picture shows how it was before. You can see that the files were newer there. Or are they all the same?

 

 

[CPVC]

2 hours ago, jeno3 said:

Hi and thanks for the update.

 

The butt physics still has glitches, so I've disabled it. The physics settings window looks different for me, I have no idea why. For you, it looks like you can adjust it using the sliders. I can only click in there and the value changes upwards, but not downwards.

 

 

 

Now that's odd. What is your screen resolution? I thought I had UI scaling working, but maybe not.

 

2 hours ago, jeno3 said:

I was a little surprised. Some of the files in your mod folder are older than mine. I've now taken all the files from your last mod folder, but mine were newer. I'm sending you two pictures. The first shows how I'm running it now after your update, since you attached the files. The second picture shows how it was before. You can see that the files were newer there. Or are they all the same?

 

 

 

They are the same. Last time I put together a package I used the files directly from my mods folder which are copies of the originals. This time I just used the originals. They really are that old.

[jeno3]

6 minutes ago, CPVC said:

Now that's odd. What is your screen resolution? I thought I had UI scaling working, but maybe not.

I don't have it open in full screen, only in windowed mode. I'll try it in full screen.

[aardin]

Hi CPVC, I installed the new version this morning, apart from the random vertices it seems to be working great, I have however had 2 crashes in the 8 hours i have played today, it just crashes the game to desktop without even the usual error box popup, i have attached my log from this last crash. I do have 1 small QoL issue tho, i can not remember if the old version had it in the GUI or not, could we get separate (Left/Right) breast sliders please, i like to change the mass of one a tiny (.001 usually) amount so that the simulation doesn't have them always doing the same thing, thanks and keep up the great work.

Log.txt

[xxdungeonxx1]

@CPVC Thanks for the update, its great. I also noticed some quircks with some males. I dont know what is causing some to have bouncing shoulders. I noticed a particular townie, Anjelo Morlind have his shoulders bounce at the school. 

[HentaiGai]

Just wanted to say, played for several hours yesterday with the new release and it has been working great for me. There's still the known issues with some butts and some male shoulders but these are minor issues for me as I can just replace the clothes or accessories causing the butt sag and I can just remove or replace males with bouncing shoulders...

 

Thank you very much for all of your hard work on this!!!

[jeno3]

Something's wrong with my game. I've switched to fullscreen mode, but this only worked if I replaced the DLL file you provided with an older version. With the current version, the game crashes immediately if I change the resolution or switch between fullscreen and windowed mode. However, I don't have any sliders in fullscreen mode either. It still looks exactly the same as in the picture. I've set the resolution to the highest setting.

[jeno3]

I started the game without any additional mods, just with RTBP, but got the same result. No sliders in the GUI, and switching between fullscreen and windowed mode results in an immediate crash. Even opening the task manager causes the game to crash.

 

I have no idea what it could be. I was hoping it was a collision with another mod, but I can now rule that out.

[johnsmith1006]

Log.txt

my game seems to keep crashing out of nowhere after a couple minutes, using latest build. same thing happened with previous ones as well

[CPVC]

15 hours ago, aardin said:

Hi CPVC, I installed the new version this morning, apart from the random vertices it seems to be working great, I have however had 2 crashes in the 8 hours i have played today, it just crashes the game to desktop without even the usual error box popup, i have attached my log from this last crash. I do have 1 small QoL issue tho, i can not remember if the old version had it in the GUI or not, could we get separate (Left/Right) breast sliders please, i like to change the mass of one a tiny (.001 usually) amount so that the simulation doesn't have them always doing the same thing, thanks and keep up the great work.

Log.txt 8.24 MB · 1 download

 

You log file shows that your game crashed because of a Python function. I think the crash might be due to a mod.

 

...
3: 0xb3c99120 PyEval_EvalFrameDefault
4: 0xb3c94880 PyEval_EvalCodeWithName
5: 0xb3c97ec0 Py_CheckFunctionResult
6: 0xb3c99120 PyEval_EvalFrameDefault
7: 0xb3c97ec0 Py_CheckFunctionResult
...

 

You can right click on a slider and choose "Split/Join" to turn a single slider into separate left and right sliders. Also, "Reset" resets to the default values, and "Configure..." opens a dialog where you can configure the range of the slider.

 

15 hours ago, xxdungeonxx1 said:

@CPVC Thanks for the update, its great. I also noticed some quircks with some males. I dont know what is causing some to have bouncing shoulders. I noticed a particular townie, Anjelo Morlind have his shoulders bounce at the school. 

 

Known issue. Still need to get to the bottom of that.

 

6 hours ago, jeno3 said:

I started the game without any additional mods, just with RTBP, but got the same result. No sliders in the GUI, and switching between fullscreen and windowed mode results in an immediate crash. Even opening the task manager causes the game to crash.

 

I have no idea what it could be. I was hoping it was a collision with another mod, but I can now rule that out.

 

Try deleting "...\The Sims 4\Game\Bin\imgui.ini" if it exists. Unbeknownst to me, ImGui, the UI library I'm using for RTBP, makes a settings file for itself where it saves and restores window sizes. This is undesirable for me. I've just disabled this behavior and if others have problems like you, I'll push this change onto the current release.

 

3 hours ago, johnsmith1006 said:

Log.txt 45.07 kB · 1 download

my game seems to keep crashing out of nowhere after a couple minutes, using latest build. same thing happened with previous ones as well

 

Your log file doesn't offer any useful information. It seems like the game crashes without triggering the unhandled exception handler. Any contextual information you can add? What were you doing when the game crashed?

[johnsmith1006]

1 hour ago, CPVC said:

Your log file doesn't offer any useful information. It seems like the game crashes without triggering the unhandled exception handler. Any contextual information you can add? What were you doing when the game crashed?

my sim was just sitting in her house; it seems to crash randomly after a couple minutes. I have wicked whims installed, is there any text file that might have more information that I should add or look at to better understand what's causing this crash? my sims 4 version is 1.119.109.

[CPVC]

2 hours ago, johnsmith1006 said:

my sim was just sitting in her house; it seems to crash randomly after a couple minutes. I have wicked whims installed, is there any text file that might have more information that I should add or look at to better understand what's causing this crash? my sims 4 version is 1.119.109.

 

One of the "lastException_X.txt" or "lastCrash_X.txt" logs in your "...\Documents\Electronic Arts\The Sims 4\" folder might have some information if a mod or something is causing it. Usually when the game crashes, RTBP's unhandled exception handler will catch the exception and print a stack trace, but for some reason this didn't happen for you.

[GDG]

Hello so I am using a ReShade alongside this mod. Now the Reshade no longer uses a D3d11.dll which I should rename according to the readme.  However it seems to completely freak out my reshade. It starts with it flicking on and off, than shaders break and suddenly the game stops working (even with Reshade effects disabled.) Has this ever happened to anyone? Since this is the last mod I added and beforehand everything worked fine, I think it is the reason. But I am not sure

Edit: So after uninstalling the mod and reloading my game I finally was able to leave the lot I was stuck on. So I am guessing this is the culprit. I am attaching the logfile but I do not think it is giving any hints as far as I can tell.

Log.txt

Edited January 4 by GDG

[CPVC]

6 hours ago, GDG said:

Hello so I am using a ReShade alongside this mod. Now the Reshade no longer uses a D3d11.dll which I should rename according to the readme.  However it seems to completely freak out my reshade. It starts with it flicking on and off, than shaders break and suddenly the game stops working (even with Reshade effects disabled.) Has this ever happened to anyone? Since this is the last mod I added and beforehand everything worked fine, I think it is the reason. But I am not sure

Edit: So after uninstalling the mod and reloading my game I finally was able to leave the lot I was stuck on. So I am guessing this is the culprit. I am attaching the logfile but I do not think it is giving any hints as far as I can tell.

Log.txt 76.7 kB · 1 download

 

I'm not sure what's going on with ReShade. I think they may be doing something different to hook the game now, so the documentation might be outdated. Try installing RTBP first, then ReShade. Whatever they're doing now worked for me.

[jeno3]

16 hours ago, CPVC said:

Try deleting "...\The Sims 4\Game\Bin\imgui.ini" if it exists. Unbeknownst to me, ImGui, the UI library I'm using for RTBP, makes a settings file for itself where it saves and restores window sizes. This is undesirable for me. I've just disabled this behavior and if others have problems like you, I'll push this change onto the current release.

I can't find this file on my system, so it doesn't seem to exist. No worries, though. I'm just waiting for a new version. I'm currently using the second-to-last version of D11dll. With that, I have sliders.😉

[xxdungeonxx1]

Besides the shoulder problems, I noticed that sometimes it doesnt work with womans asses, and it also makes the game crash on loading a new world or traveling. Its great overall, Im looking forward to see it without these minor bugs, Nice work. 

[BossCowboy]

On 12/25/2025 at 3:00 PM, CPVC said:

 

Thanks for the feedback! Yeah, there are still some known issues, hopefully none of which are a deal breaker for anyone. I'm sure they'll get sorted with time. I really want to get the GUI working for everyone so I can release this, then I can focus on fixing the rest of the visual glitches for the next release. So thanks for you log file, that should help.

 

Gorgeous sim, by the way. She's a cutie.

Game crashes try this combination- RTBP v0.4-p9-e3 2025-12-11  -  RTBP v2.0 2026-01-01

[Pantera2]

My game won't even launch with the .dll or D3d11.dl  files in the Bin. It launched just fine without them so I don't know what to do here. I'm using RTBP v2.0 2026-01-01 and RTBP GUI Tools 2026-01-01.zip.

Edited January 5 by Pantera2

[CPVC]

On 1/4/2026 at 3:25 PM, xxdungeonxx1 said:

Besides the shoulder problems, I noticed that sometimes it doesnt work with womans asses, and it also makes the game crash on loading a new world or traveling. Its great overall, Im looking forward to see it without these minor bugs, Nice work. 

 

23 hours ago, Pantera2 said:

My game won't even launch with the .dll or D3d11.dl  files in the Bin. It launched just fine without them so I don't know what to do here. I'm using RTBP v2.0 2026-01-01 and RTBP GUI Tools 2026-01-01.zip.

 

Let me see your log files if you got them. Also, share any popups or whatever if they appear. Also, updating your graphics drivers can't hurt. It's worked in the past for some people.

[yokozii]

my game is running smooth with RBTP + RESHADE DX11 running on Intel OS! 

 

some tips & things to know as of Jan 2026 update: 

 

• install the mod the exact same way as instructed originally. do not forget to change your graphics rules  fileif you have an intel processor or this will NOT work.
• click the INSTALLATION . HTML for instructions how to install if you forget. it will tell you things for DX9 but most of it is the same
•  
• RTBP will create a new default settings.ini if you delete or want a fresh one with basic settings.
•  
• you do not need to rename the file to reshade.dll it will NOT work. keep it unchanged , the instructions in the zip are for DX9 not DX11. just drag and drop. 
•  
• open the GUI with shortcut F8 or F11 .
• if you have intel the way to open the UI looks the same as reshade and GUI might not open if you keybind anything from reshade to F8 or F11 
• GUI is not something I use because of reshade , I use manual settings
•  
• open the settings.ini in notepad and hit save to adjust RBTP changes and test them real time (manually) in game from CAS .
• switch to another outfit / walkstyle and the changes will show in a few seconds. this is a good time to test reshade + RTBP in CAS
•  
• install RTBP then reshade after. so uninstall or move your reshade folders + presets to a temp folder, run game , run RTBP , close game, install reshade again. 
•  
• letting your game load without playing  for at least 30 minutes + helps minimize distorted graphic bouncing issues. but they occur more if you play with your diagonal & damping settings alot. 
• I haven't tried the commander so I don't know how that will work . 
• reshade loads the same time as the startup logo png , I  set it to false for this reason in settings.ini for less less load time BUT installing it with the logo works for me and the file without logo does not. 
•  

EDIT : GUI in game commander (not the old program) does work with reshade I just rarely use it because the shaders can blur or mess up the UI see here

 

Edited January 8 by yokozii

[shinichi104]

On 12/28/2025 at 5:12 AM, yokozii said:

I'm definitely interested in the blender plugin for my mods ! ;D I'll be on lookout for whenever you release this

same i love your what a peach sliders and i noticed that if a sim wears a shirt that covers their butt that there are no physics there just on the pants.

[LeoTheImmortal]

so this is the only logs i could find for this crash. i realized that the directx 9 version is now considered legacy but its far for more stable the dx11(probably more of an issue with the directx version of the game than your mod) for my heavy modded game. i dont know why this happens but its been happening alot. the mod is functional until this happens, when your mod does produce its own error message it'll allow me to still save and looks functional. i do have other crash logs from the event viewer pointing to d3d9.dll. i played sims years ago when it was far more stable with your mod install. i cant say for certain if other mods are doing it. i do have better exceptions install but i fixed the issues it was complaining about so it stopped alerting me to issues. i can play for several hours some times before this happens sometimes its only less than an hour. i did try to keep any personal info out of the the screenshots

[HentaiGai]

14 hours ago, catk1775 said:

so this is the only logs i could find for this crash. i realized that the directx 9 version is now considered legacy but its far for more stable the dx11(probably more of an issue with the directx version of the game than your mod) for my heavy modded game. i dont know why this happens but its been happening alot. the mod is functional until this happens, when your mod does produce its own error message it'll allow me to still save and looks functional. i do have other crash logs from the event viewer pointing to d3d9.dll. i played sims years ago when it was far more stable with your mod install. i cant say for certain if other mods are doing it. i do have better exceptions install but i fixed the issues it was complaining about so it stopped alerting me to issues. i can play for several hours some times before this happens sometimes its only less than an hour. i did try to keep any personal info out of the the screenshots

 

What version of RTBP are you running...?

 

Also, you can get more in-depth reports if you use Better Exceptions from TwistedMexi - https://www.patreon.com/posts/better-v3-15-130049745

 

It's on Patreon but it's a free download. Really saves me a lot of time and headaches.

 

Also, if you're not already, it could be helpful to use the Sims 4 Mod Manager which has tools to check for duplicate files, files that need updating and a lot more - https://gametimedev.de/S4MM/

[LeoTheImmortal]

7 hours ago, RealSiViX said:

 

What version of RTBP are you running...?

 

Also, you can get more in-depth reports if you use Better Exceptions from TwistedMexi - https://www.patreon.com/posts/better-v3-15-130049745

 

It's on Patreon but it's a free download. Really saves me a lot of time and headaches.

 

Also, if you're not already, it could be helpful to use the Sims 4 Mod Manager which has tools to check for duplicate files, files that need updating and a lot more - https://gametimedev.de/S4MM/

should be this one v0.4-p8 2024-04-12 should be latest? i'm not certain to be honest the files arent stamped with the file version in properties, could be the p9-e3 file
better exceptions has already been install before this issue
installing S4MM now.
switch out rtbp yesterday for the tonic's bouncing mod i didn't experience any crashes, but going to do more testing cause i know it has very weird crash intervals