wip Real-Time Body Physics (DirectX 11)

[CPVC]

21 hours ago, Gzbbbbbb said:

Thank you for your update support, but there is a minor issue. After updating and using d3d11, I noticed that the thumbnails of characters in the game have errors. I'm not sure what's causing this. Is it just Log.txtme who has this issue, or is it happening to everyone

 

This is a known issue. I'll see what I can do about it. That and a lot of other tiny bugs will get fixed with time.

 

 

Everyone else, I'm working on a little error reporting application that will be bundled with future versions of RTBP. When an RTBP-related error occurs, it'll pop up and allow you to send your log to me if you desire. Optionally, you can add your email address and a comment if you'd like to potentially be contacted by me regarding your log. I might want to get in touch for testing purposes.

 

This is, of course, completely optional. The tool will never send anything without your permission. Nothing personal will be collected, just your log file and maybe some hardware information in the future. The logs go directly to a server owned by me, nobody but me will ever have access to it.

 

This is a far better way of sending me your reports compared to having to do it manually here on Lover's Lab. Best of all, they'll be inserted into a database that I'll be able to query for search terms to find out how many users are having a certain problem.

 

[poisonwolf666]

Where's the latest download ?

[CPVC]

11 hours ago, poisonwolf666 said:

Where's the latest download ?

 

Right here: 

 

[0Spirit0]

On 2/19/2026 at 3:07 PM, Overdraft0213 said:

 

Don't use fullscreen. In your document Documents\Electronic Arts\The Sims 4\Options.ini 

Change the value to (choose one, i use windowedfullscreen):

• Windowed fullscreen: fullscreen = 1, windowedfullscreen = 1
• Windowed: fullscreen = 0, windowedfullscreen = 0

Hi.
Sorry late reply.
This solved the issue.

 

[Reddud3]

I seem to abruptly crash loading CAS. I get no logs anywhere except in the RTBP folder, so I figured it could be RTBP related. Build Buy and Live mode work fine, and RTBP seems functional there.

 

 

Log.txt

[poisonwolf666]

On 2/28/2026 at 4:58 AM, CPVC said:

H

Right here: How to uninstall ?

 

 

[CPVC]

Here's the initial version of the error reporter if you'd like to try it out. In the future this will run after RTBP crashes and allow you to send an error report if you'd like. The contents of your log file, your email address (totally optional), and a comment (also optional), will be sent to my server and inserted in a database where I'll be able to search the collected logs and hopefully figure out how to fix some of the issues plaguing RTBP.

 

Try it out if you'd like. It should automatically find your log file and send it to my server. We're just testing right now, so feel free to send as many error reports as you like and type whatever into the optional fields. Let me know if there are any problems.

 

Oh, and I'm using free hosting so the server might not have 100% uptime or it could be slow or something.

RTBP Error Reporter v0.1.zip

[mrjoshua1610]

hello! im having issues using the RTBP Installer.

 

 

RTBP File: C:\Users\joshg\Downloads\RTBP v2.0 2026-01-01.zip

Sims 4 Install Dir: C:\Program Files (x86)\Steam\steamapps\common\The Sims 4\

Sims 4 Documents Dir: C:\Users\joshg\Documents\Electronic Arts\The Sims 4

RTBP Documents Dir: C:\Users\joshg\Documents\Electronic Arts\The Sims 4\RTBP

Using RTBP Install Library, built on Jan 1 2026

Checking system for requisite libraries...

System DLL found. Using "C:\WINDOWS\system32\dbghelp.dll" for library "dbghelp.dll"

Testing loading library "C:\WINDOWS\system32\dbghelp.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\kernel32.dll" for library "kernel32.dll"

Testing loading library "C:\WINDOWS\system32\kernel32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\msvcrt.dll" for library "msvcrt.dll"

Testing loading library "C:\WINDOWS\system32\msvcrt.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\shell32.dll" for library "shell32.dll"

Testing loading library "C:\WINDOWS\system32\shell32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\user32.dll" for library "user32.dll"

Testing loading library "C:\WINDOWS\system32\user32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\ws2_32.dll" for library "ws2_32.dll"

Testing loading library "C:\WINDOWS\system32\ws2_32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\dwmapi.dll" for library "dwmapi.dll"

Testing loading library "C:\WINDOWS\system32\dwmapi.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\gdi32.dll" for library "gdi32.dll"

Testing loading library "C:\WINDOWS\system32\gdi32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\dbghelp.dll" for library "dbghelp.dll"

Testing loading library "C:\WINDOWS\system32\dbghelp.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\ole32.dll" for library "ole32.dll"

Testing loading library "C:\WINDOWS\system32\ole32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\windowscodecs.dll" for library "windowscodecs.dll"

Testing loading library "C:\WINDOWS\system32\windowscodecs.dll"...

Loading succeeded.

Using "C:\WINDOWS\system32\" for D3D compiler library

Testing loading library "C:\WINDOWS\system32\"...

Unable to load library "C:\WINDOWS\system32\". Error code: 126

Compiler library found, but loading it failed

Installer failed!: Requisite library missing

Further Information: RTBP ZIP File Valid? Yes. Install Dir Valid? Yes. Docs Dir Valid? Yes.

 

 

im unsure what library im missing

[CPVC]

47 minutes ago, mrjoshua1610 said:

hello! im having issues using the RTBP Installer.

 

 

RTBP File: C:\Users\joshg\Downloads\RTBP v2.0 2026-01-01.zip

Sims 4 Install Dir: C:\Program Files (x86)\Steam\steamapps\common\The Sims 4\

Sims 4 Documents Dir: C:\Users\joshg\Documents\Electronic Arts\The Sims 4

RTBP Documents Dir: C:\Users\joshg\Documents\Electronic Arts\The Sims 4\RTBP

Using RTBP Install Library, built on Jan 1 2026

Checking system for requisite libraries...

System DLL found. Using "C:\WINDOWS\system32\dbghelp.dll" for library "dbghelp.dll"

Testing loading library "C:\WINDOWS\system32\dbghelp.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\kernel32.dll" for library "kernel32.dll"

Testing loading library "C:\WINDOWS\system32\kernel32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\msvcrt.dll" for library "msvcrt.dll"

Testing loading library "C:\WINDOWS\system32\msvcrt.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\shell32.dll" for library "shell32.dll"

Testing loading library "C:\WINDOWS\system32\shell32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\user32.dll" for library "user32.dll"

Testing loading library "C:\WINDOWS\system32\user32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\ws2_32.dll" for library "ws2_32.dll"

Testing loading library "C:\WINDOWS\system32\ws2_32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\dwmapi.dll" for library "dwmapi.dll"

Testing loading library "C:\WINDOWS\system32\dwmapi.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\gdi32.dll" for library "gdi32.dll"

Testing loading library "C:\WINDOWS\system32\gdi32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\dbghelp.dll" for library "dbghelp.dll"

Testing loading library "C:\WINDOWS\system32\dbghelp.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\ole32.dll" for library "ole32.dll"

Testing loading library "C:\WINDOWS\system32\ole32.dll"...

Loading succeeded.

System DLL found. Using "C:\WINDOWS\system32\windowscodecs.dll" for library "windowscodecs.dll"

Testing loading library "C:\WINDOWS\system32\windowscodecs.dll"...

Loading succeeded.

Using "C:\WINDOWS\system32\" for D3D compiler library

Testing loading library "C:\WINDOWS\system32\"...

Unable to load library "C:\WINDOWS\system32\". Error code: 126

Compiler library found, but loading it failed

Installer failed!: Requisite library missing

Further Information: RTBP ZIP File Valid? Yes. Install Dir Valid? Yes. Docs Dir Valid? Yes.

 

 

im unsure what library im missing

 

You're missing the D3D compiler library. Try downloading and installing this:

 

https://www.microsoft.com/en-US/download/details.aspx?id=35

 

The DLL you need should be in there.

[randommoddeidk]

20 hours ago, CPVC said:

 

You're missing the D3D compiler library. Try downloading and installing this:

 

https://www.microsoft.com/en-US/download/details.aspx?id=35

 

The DLL you need should be in there.

Hi,

I’m trying to install RTBP v2.0 (build Jan 1 2026) and the installer fails during the “requisite libraries” check.

In the installer log it selects the D3D compiler “library” as a folder path and then calls LoadLibrary on the folder:

• Using “C:\Windows\system32\” for D3D compiler library

• Testing loading library “C:\Windows\system32\”…

• Unable to load library “C:\Windows\system32\”. Error code: 126

• Compiler library found, but loading it failed

• Installer failed!: Requisite library missing

D3DCompiler_47.dll is present on my system (both System32 and SysWOW64). It looks like getLatestD3DCompilerDLL(...) returns an empty filename (or the path join drops the filename), resulting in a directory-only path.

Environment:

• Windows 11 x64

• Sims 4 install dir: D:\steam\steamapps\common\The Sims 4

• RTBP zip: C:\Users\offic\Downloads\App\core\RTBP v2.0 2026-01-01.zip

 

Thanks

RTBP Installer Log.txt

Edited March 4 by randommoddeidk

[CPVC]

6 hours ago, randommoddeidk said:

Hi,

I’m trying to install RTBP v2.0 (build Jan 1 2026) and the installer fails during the “requisite libraries” check.

In the installer log it selects the D3D compiler “library” as a folder path and then calls LoadLibrary on the folder:

• Using “C:\Windows\system32\” for D3D compiler library

• Testing loading library “C:\Windows\system32\”…

• Unable to load library “C:\Windows\system32\”. Error code: 126

• Compiler library found, but loading it failed

• Installer failed!: Requisite library missing

D3DCompiler_47.dll is present on my system (both System32 and SysWOW64). It looks like getLatestD3DCompilerDLL(...) returns an empty filename (or the path join drops the filename), resulting in a directory-only path.

Environment:

• Windows 11 x64

• Sims 4 install dir: D:\steam\steamapps\common\The Sims 4

• RTBP zip: C:\Users\offic\Downloads\App\core\RTBP v2.0 2026-01-01.zip

 

Thanks

RTBP Installer Log.txt 2.77 kB · 0 downloads

 

Whoops, you are correct. I see what the problem is now. I'll get that fixed and reuploaded as soon as possible.

[jaks500]

I need some help please i can't install it correctly. Please i need helpGuys I need some help please i can't install it correctly. Please i need help @CPVC

[Miller826]

Thanks for all the hard, free work. I have two comments.

1. Awesome that RTBP for DirectX 11 is now available. However, under "Note on DirectX 11" it stills says  that RTBP requires the DX9-version of the game to be played. I think that needs to be updated.
2.  On the mod page you say that peeps with an "Intel GPU" need tp make a change to the graphics rules of the game. But in your readme-file that comes with the mod you say that peeps with Integrated GPU's need to make that change. Those things are not the same. So which is it?

Thnx. 

[IcarusV6]

Hi! I love you mod

 

Do you have a settings file to share??
This update came without the config, so i don´t know how to enable the physics correctly. I enabled some of the "testphysics" flags and i got something.

[CPVC]

On 3/5/2026 at 12:02 AM, jaks500 said:

I need some help please i can't install it correctly. Please i need helpGuys I need some help please i can't install it correctly. Please i need help @CPVC

 

What issue are you having?

 

On 3/5/2026 at 4:10 AM, Miller826 said:

Thanks for all the hard, free work. I have two comments.

1. Awesome that RTBP for DirectX 11 is now available. However, under "Note on DirectX 11" it stills says  that RTBP requires the DX9-version of the game to be played. I think that needs to be updated.
2.  On the mod page you say that peeps with an "Intel GPU" need tp make a change to the graphics rules of the game. But in your readme-file that comes with the mod you say that peeps with Integrated GPU's need to make that change. Those things are not the same. So which is it?

Thnx. 

 

Thanks for the heads up. I'll go over the docs and make sure everything is correct and up to date.

 

Regarding the Intel/integrated issue, in my mind they both mean the same thing so I use them interchangeably. Its a holdover from days past, back before Intel made discrete GPUs. But yes, I should clarify that the type of GPU I'm referring to is an Intel integrated GPU, the kind that is built in to the CPU and shares memory with the GPU. When the Sims 4 detects a GPU of this type it will do skinning on the CPU rather than the GPU. It must be faster to do it that way, but it completely bypasses RTBP. Changing the configuration file is necessary to prevent this.

 

On 3/6/2026 at 6:53 PM, IcarusV6 said:

Hi! I love you mod

 

Do you have a settings file to share??
This update came without the config, so i don´t know how to enable the physics correctly. I enabled some of the "testphysics" flags and i got something.

The default settings are what I use. I like it pretty tame. If you want to see some major boobage, try out flags "textAltBreastPhysics1" or "testAltBreastPhysics6". Remember to only enable one at a time.

[fqjweyfejwaajytwfjaajejtfj]

hiya, when i install this (using the installer in the gui tools folder), it says everything is okay, but then when i try to launch the game (even without the mods folder, just in case), the ea app says its launching, and i get a flash of white as if the game has launched, but then nothing. for some reason i can't link the log file here, but i can tell you it's literally blank. like there's absolutely nothing there when i open it, and its listed as 0KB

[APassingGhost]

I don't know if this has already been asked/addressed/fixed, but I think the mod is causing my sims' meshes to be a little weird in CAS? My female sims' breasts seem to have their tips locked in one spot, making it look really weird because the rest of the body is moving but the tips aren't, and also the meshes become uneditable. Any idea what's going on there?

[APassingGhost]

Upon further inspection, I can just manually turn off simulation in CAS, so nevermind

[Overdraft0213]

On 3/17/2026 at 6:34 AM, fqjweyfejwaajytwfjaajejtfj said:

hiya, when i install this (using the installer in the gui tools folder), it says everything is okay, but then when i try to launch the game (even without the mods folder, just in case), the ea app says its launching, and i get a flash of white as if the game has launched, but then nothing. for some reason i can't link the log file here, but i can tell you it's literally blank. like there's absolutely nothing there when i open it, and its listed as 0KB

 

[APassingGhost]

Wait I have a real bug to report

 

Uh for some reason children are broken and sort of spaz everywhere

[CPVC]

RTBP v2.1-p1 is up. Very little changes have been made to RTBP, but it now ships with a little tool I'm calling the RTBP Companion. In addition to reporting errors, it will check for updates, run diagnostics, and other things I decide in the future. The Companion is completely optional. If you'd rather not have have anything to do with it, just delete it. If it is available, though, RTBP will launch it in error report mode when an error occurs and allow you to optionally send an error report to my server so that I can examine it.

 

I'm hoping that collecting more error reports will give me the information I need to fix some of the problems facing RTBP. Far too many users are still having issues and I hope to fix that so I can start working on other things.

 

When launched on it's own, the Companion will be in "hub" mode, allowing you to choose what feature of the application you'd like to access. The hub is where you'll get your RTBP news and be informed of any updates.

 

If you rely on the Installer to install RTBP for you, you will need to get the latest version to install the update. Let me know if there are any problems and I'll get them fixed as soon as I can.

 

Edit: Oh, and be patient with our servers. It's free hosting, so it's not super reliable. If you see connection error messages pop up, just wait a minute and try again.

 

Real-Time Body Physics

RTBP GUI Tools 2026-03-20.zip

Edited March 19 by CPVC

[Yotix]

Just tried this for the first time, downloaded a base game sim from the gallery (she turned out to be a teen).

- crash on first game start (sent the log)

- no crash on second game start

- my test sim's boobs did seem to bounce

- in CAS one of her breasts is much larger and tilted to the side

 

Log.txt

[CPVC]

On 3/18/2026 at 10:50 PM, APassingGhost said:

Wait I have a real bug to report

 

Uh for some reason children are broken and sort of spaz everywhere

 

That's a known issue. Now that I've got the Companion/error reporting done, I'll start working on tackling some of the visual glitches.

 

13 hours ago, Yotix said:

Just tried this for the first time, downloaded a base game sim from the gallery (she turned out to be a teen).

- crash on first game start (sent the log)

- no crash on second game start

- my test sim's boobs did seem to bounce

- in CAS one of her breasts is much larger and tilted to the side

 

Log.txt 149.42 kB · 0 downloads

 

Interesting. I'll take a look at your log. Thanks for sending it.

[CPVC]

Thanks for the log files, guys. It's been helpful. I've already gotten quite a few and it's clear to me that one bug stands out overwhelmingly as the main culprit of a lot of users' RTBP woes. I'll work on that right away.

 

Another log I caught showed a user having problems getting RTBP working with ReShade. The old way of getting ReShade to work with RTBP doesn't appear to work anymore, but that's fine because there is no longer a conflict between RTBP and ReShade.

 

ReShade hooks another DLL now and I can confirm that RTBP and ReShade work together without any extra work. If you were using the old method before, simply delete the "ReShade64.dll", "reshade.dll", etc in your "Game\Bin\" folder and install the latest version of ReShade on top of that.

 

I will remove the old compatibility code from the next version of RTBP and the installer and I'll update the readme so there's no confusion.

 

Thanks for the help and sorry about all the hiccups along the way. With the error reporting system, I should be able to get things fixed much faster.

 

https://streamable.com/3t430b

[CPVC]

If you are one of the users that just recently send me an error report through the Companion (within the last couple days), would you mind testing something for me? Try this DLL and see if it works for you, thanks. If I'm correct, this could fix RTBP for a lot of users. Fingers crossed.

RTBP v2.1-p1-e1 (2026-03-22).zip