wip Real-Time Body Physics (DirectX 11)

[ArtEdit]

Hi, first of all, thank you for developing this mod.

I recently upgraded my graphics card from an NVIDIA RTX 1060 to an NVIDIA RTX 5060. Before the upgrade, the mod worked perfectly.

The issue is that when I run the game in exclusive fullscreen mode, everything works fine. However, if I switch to windowed mode or borderless fullscreen, the game crashes. It also crashes if I minimize the game using the Windows key or Alt+Tab.

I believe the issue is related to this mod because if I disable it, I can switch between fullscreen, windowed, and borderless modes, as well as Alt+Tab and minimize the game without any crashes.

I've attached the log file.

Log.txt

Edited June 28 by ArtEdit

[RavenTwain]

On 4/28/2026 at 10:54 PM, CPVC said:

 

Oh, I see, you're running 2.2. You don't have the new GUI. In 2.2, linear physics have to be enabled with debug flags. Press "F11" to open the GUI, click the "Debug Flags" tab, find and check the flag that says "enableLinearPhysics" to enable linear physics.

 

After that the "Test Linear (X|Y|Z)" buttons should work. You can use linear physics at the same time as angular physics, or you can disable angular to just have linear. Check the debug flag "disableAngularPhysics" to do this.

 

In the next version, the GUI will look like this:

 

 

Linear, angular, and exaggeration can be enabled/disabled for each simulator.

I do not have this option:
My 'Companion' app/program and default settings is from May, 2026. Saving with the GUI removes all aspects of 'exaggerate' from said file too. If this is the same as disabling it, than i have no issue/need to fix fn. lol

Edited June 28 by RavenTwain
added context

[jeno3]

18 hours ago, ArtEdit said:

Hi, first of all, thank you for developing this mod.

I recently upgraded my graphics card from an NVIDIA RTX 1060 to an NVIDIA RTX 5060. Before the upgrade, the mod worked perfectly.

The issue is that when I run the game in exclusive fullscreen mode, everything works fine. However, if I switch to windowed mode or borderless fullscreen, the game crashes. It also crashes if I minimize the game using the Windows key or Alt+Tab.

I believe the issue is related to this mod because if I disable it, I can switch between fullscreen, windowed, and borderless modes, as well as Alt+Tab and minimize the game without any crashes.

I've attached the log file.

Log.txt 6.29 kB · 1 download

I had this problem too. Try the following: Remove the DLL file from the Game-Bin folder. Then start the game and change your mode. After that, exit the game and put the DLL back in the folder. That’s how it worked for me; I only use windowed mode. If you do it this way, you can minimize the game without it crashing.

[ArtEdit]

2 hours ago, jeno3 said:

I had this problem too. Try the following: Remove the DLL file from the Game-Bin folder. Then start the game and change your mode. After that, exit the game and put the DLL back in the folder. That’s how it worked for me; I only use windowed mode. If you do it this way, you can minimize the game without it crashing.

I already tried that, but if I start the game in either windowed or borderless windowed mode, it crashes right after the RTBP logo appears.

[Quabn]

So I also have the same problem with DX11 version

 

While playing in Fullscreen everything seem fine until I Alt+Tab out and then get this message

[CPVC]

On 6/28/2026 at 2:47 AM, ArtEdit said:

Hi, first of all, thank you for developing this mod.

I recently upgraded my graphics card from an NVIDIA RTX 1060 to an NVIDIA RTX 5060. Before the upgrade, the mod worked perfectly.

The issue is that when I run the game in exclusive fullscreen mode, everything works fine. However, if I switch to windowed mode or borderless fullscreen, the game crashes. It also crashes if I minimize the game using the Windows key or Alt+Tab.

I believe the issue is related to this mod because if I disable it, I can switch between fullscreen, windowed, and borderless modes, as well as Alt+Tab and minimize the game without any crashes.

I've attached the log file.

Log.txt 6.29 kB · 1 download

 

Try this build here. It might do the trick. Do a manual install. This build is similar to the last one, but makes more of the system DLL functions available through RTBP. I think I'm on the right track with that, but I'm not sure about this implementation.

 

RTBP v2.3~3 2026-06-29.zip

 

17 hours ago, Quabn said:

So I also have the same problem with DX11 version

 

While playing in Fullscreen everything seem fine until I Alt+Tab out and then get this message

 

This issue has been fixed in the attached build I believe. It will be part of the next release.

[ArtEdit]

16 hours ago, CPVC said:

 

Try this build here. It might do the trick. Do a manual install. This build is similar to the last one, but makes more of the system DLL functions available through RTBP. I think I'm on the right track with that, but I'm not sure about this implementation.

 

RTBP v2.3~3 2026-06-29.zip 1.57 MB · 1 download

 

 

This issue has been fixed in the attached build I believe. It will be part of the next release.

It works now with this version when running in windowed fullscreen. However, if I go to the options and switch it to exclusive fullscreen, the game freezes without showing any error, either in the log or as an error message.

If I try to continue my save while using windowed fullscreen, it starts loading, but then suddenly closes without displaying any error in the log or any error message.

[CPVC]

5 hours ago, ArtEdit said:

It works now with this version when running in windowed fullscreen. However, if I go to the options and switch it to exclusive fullscreen, the game freezes without showing any error, either in the log or as an error message.

If I try to continue my save while using windowed fullscreen, it starts loading, but then suddenly closes without displaying any error in the log or any error message.

 

Hmmm, ok. I'll have access to a machine I can do a ton of extensive testing on later this week, with Windows 11 and an NVidia GPU. I'll try to get this issue sorted then.

[HentaiGai]

Latest update seems to have broken this mod, I even tried the latest version released yesterday, Better Exceptions says:

"The listed script mod failed to load and should be removed or updated. Failure: 'C:\Users\triba\Documents\Electronic Arts\The Sims 4\Mods\RTBP Mod\Scripts\Client' (Client) unexpected EOF while parsing (Client.py, line 19) (SyntaxError: unexpected EOF while parsing (Client.py, line 19))"

 

Hopefully, this information is useful!

 

 

EDIT:

I rolled back to the previous version I was using (RTBP v2.3 2026-05-19) and this version seems to be working fine

Edited July 1 by RealSiViX

[0Spirit0]

Also, your dll (I tryed all since version 2.1) don't work on latest nvidia drivers. Updated the drivers yesterday and the game don't run anymore.

[CPVC]

12 hours ago, RealSiViX said:

Latest update seems to have broken this mod, I even tried the latest version released yesterday, Better Exceptions says:

"The listed script mod failed to load and should be removed or updated. Failure: 'C:\Users\triba\Documents\Electronic Arts\The Sims 4\Mods\RTBP Mod\Scripts\Client' (Client) unexpected EOF while parsing (Client.py, line 19) (SyntaxError: unexpected EOF while parsing (Client.py, line 19))"

 

Hopefully, this information is useful!

 

 

EDIT:

I rolled back to the previous version I was using (RTBP v2.3 2026-05-19) and this version seems to be working fine

 

Woops, that's not supposed to be in there. That's an old file from an older version of the script mod. I've removed it and reuploaded. Thanks for bringing this to my attention.

 

4 hours ago, 0Spirit0 said:

Also, your dll (I tryed all since version 2.1) don't work on latest nvidia drivers. Updated the drivers yesterday and the game don't run anymore.

 

Yes, that appears to be the case. I'll get this fixed as soon as I can. Like I said earlier, I'm going to be doing some testing on a NVidia machine soon, so hopefully I'll find a fix.

[ArtEdit]

I didn't realize you had another version on the forum's main page, "RTBP v2.3~3 2026-07-01.zip".

I tried it, and this time I was able to load my save successfully in borderless windowed mode. The only issue is that the game crashes if I switch to fullscreen mode.

[CPVC]

On 7/9/2026 at 10:07 AM, ArtEdit said:

I didn't realize you had another version on the forum's main page, "RTBP v2.3~3 2026-07-01.zip".

I tried it, and this time I was able to load my save successfully in borderless windowed mode. The only issue is that the game crashes if I switch to fullscreen mode.

 

Still trying to fix that. I think I know what I need to do, though.

 

As for the other problems users have been facing, I've run into a little snag. Every single computer I've tested RTBP on it works out of the box, 100%, no problems whatsoever. However, I was wrong about the GPU in one of the machines. It was an AMD, not a NVidia, so I still need to test RTBP out on a machine with an NVidia GPU.

 

I'm thinking that I might be barking up the wrong tree a bit here, though. I have a version of the Sims 4 that is independent of all game launchers, so there is no Steam or EA App/whatever they're calling it now integration. It's possible that an overlay could be causing problems. I can confirm that it works with the Steam overlay, but I'm not certain about the EA one.

 

If any of you have been having problems with RTBP, try disabling the overlay if you can and let me know if it works.

[Nnuos]

First of all, thank you for your work. I noticed in the game that the shoulders of men tend to look like the illustration, which seems to be a problem with the breast.

[CPVC]

On 7/12/2026 at 6:44 AM, Nnuos said:

First of all, thank you for your work. I noticed in the game that the shoulders of men tend to look like the illustration, which seems to be a problem with the breast.

 

That is a known issue. Sometimes the male shoulders are erroneously detected as breasts. I'll work on it.

[evexec]

Just wanted to say thank you for the mod!! Also, you seem to be one of the best modders I've seen in regards to communicating with your users and just being overall active, and it's been super cool looking back and seeing some of the more technical details of your process (like the switch to angular physics)!!!

[CPVC]

On 7/17/2026 at 9:03 PM, evexec said:

Just wanted to say thank you for the mod!! Also, you seem to be one of the best modders I've seen in regards to communicating with your users and just being overall active, and it's been super cool looking back and seeing some of the more technical details of your process (like the switch to angular physics)!!!

 

Thanks for the kind worlds! I do what I can.