wip Real-Time Body Physics (DirectX 11)

[uncrafting]

you should to do a tutorial for instalation rtbp. it's very dificult

[uncrafting]

when i dowload the mod my character his butt it's very weird it's like stretching so far and looks so weird. i tried to download the aplication tool that you sent but in ''intalation rtbp'' i don't know how to select the archives that needs

[uncrafting]

i don't get it what is the problem. when i want to selec the zip i can't select anything. ¿what do i do?

[CPVC]

12 hours ago, uncrafting said:

i don't get it what is the problem. when i want to selec the zip i can't select anything. ¿what do i do?

 

Download the ZIP file right here:

 

 

Choose this file in the installer and it will extract it and put everything where it needs to be.

[eldr3d]

On 2/20/2025 at 5:00 AM, CPVC said:

 

Yup. The actual mesh data in game doesn't line up with exported rigs. The only way I've found of determining bone indexes is by analyzing the mesh through geometric queries.

 

At this time it’s not possible. I haven’t been able to isolate the model matrix. There’s currently no way to determine where a sim exists in 3D space, at least one that I’ve discovered.

 

I’m not saying it’s impossible, but at this time it’s not feasible.

Damn. Mad respect. So you only know the coordinates of the vertices relative to a sim's mesh root position?

[CPVC]

8 hours ago, eldr3d said:

Damn. Mad respect. So you only know the coordinates of the vertices relative to a sim's mesh root position?

 

Correct. I do have access to the model view projection matrix. If I can isolate the model part of the matrix, I'll know exactly where a sim is in the world.

[texassweetsnake]

Yeah the Commander Tool is not connecting.

[gman20001969]

Hey hey. Is there an update coming so RTBP works with DX11? My game flows better with DX11 vs. DX9 but... I need my realistic looking boobs!

[OAquah]

Hey, I have not been able to get this mod working for the life of me. I've used it in the past but one day it just stopped working (assuming cause of a patch). I've since updated and tried everything to get it to work. Installed it manually using the read me, installing using the installer. I've manually changed the GraphicsRules.sgr file, I make sure to run it in DX9 and yet i still get this message in my log. 

 

" Unable to connect to RTBP's simulation server: [WinError 10061] No connection could be made because the target machine actively refused it
Attempt 10/10. Retrying in 10 seconds. "

RTBP Mod Log.txt

[CPVC]

6 hours ago, OAquah said:

Hey, I have not been able to get this mod working for the life of me. I've used it in the past but one day it just stopped working (assuming cause of a patch). I've since updated and tried everything to get it to work. Installed it manually using the read me, installing using the installer. I've manually changed the GraphicsRules.sgr file, I make sure to run it in DX9 and yet i still get this message in my log. 

 

" Unable to connect to RTBP's simulation server: [WinError 10061] No connection could be made because the target machine actively refused it
Attempt 10/10. Retrying in 10 seconds. "

RTBP Mod Log.txt 1.75 kB · 0 downloads

 

Could I see your RTBP proper log? The one you posted is the simulation client log.

[eldr3d]

On 2/27/2025 at 3:57 AM, CPVC said:

 

Correct. I do have access to the model view projection matrix. If I can isolate the model part of the matrix, I'll know exactly where a sim is in the world.

I think this should still be enough for self-collision though, right? That could be interesting mainly for breasts. A few fat colliders can go a long way simulating how they actually have a fixed volume.

[SpacedOut1]

On 3/3/2025 at 3:12 PM, OAquah said:

Hey, I have not been able to get this mod working for the life of me. I've used it in the past but one day it just stopped working (assuming cause of a patch). I've since updated and tried everything to get it to work. Installed it manually using the read me, installing using the installer. I've manually changed the GraphicsRules.sgr file, I make sure to run it in DX9 and yet i still get this message in my log. 

 

 

 

I'm having a similar issue. I've used this mod in the past but recently reinstalled the game. Also installed it manually with the readme, automatically with the installer, changed the graphicrules file. Nothing. Every single attempt it says unable to connect in the commander. The installer log says everything is well and good and it's installed properly. I have reshade and followed the instructions in the readme, renaming its dll file to ensure its compatibility. 

RTBP Installer Log.txt Log.txt

[CPVC]

1 hour ago, SpacedOutOri said:

I'm having a similar issue. I've used this mod in the past but recently reinstalled the game. Also installed it manually with the readme, automatically with the installer, changed the graphicrules file. Nothing. Every single attempt it says unable to connect in the commander. The installer log says everything is well and good and it's installed properly. I have reshade and followed the instructions in the readme, renaming its dll file to ensure its compatibility. 

RTBP Installer Log.txt 7.76 kB · 0 downloads Log.txt 133.01 kB · 0 downloads

 

Hmmm, maybe I missed something? I haven't played in a while, so I'll update my game and see what I can figure out. Thank you for your log file, it was very informative.

[CPVC]

2 hours ago, SpacedOutOri said:

I'm having a similar issue. I've used this mod in the past but recently reinstalled the game. Also installed it manually with the readme, automatically with the installer, changed the graphicrules file. Nothing. Every single attempt it says unable to connect in the commander. The installer log says everything is well and good and it's installed properly. I have reshade and followed the instructions in the readme, renaming its dll file to ensure its compatibility. 

RTBP Installer Log.txt 7.76 kB · 1 download Log.txt 133.01 kB · 1 download

 

Oh, you did a simulated install. That doesn't do anything, it just lists the things it would have done had it not been a simulation. Make sure you don't check the "Simulate?" checkbox when installing.

 

Maybe your log file is an older one? From before when it was working fine?

 

I did update my game and everything is working for me.

[SpacedOut1]

1 hour ago, CPVC said:

 

Oh, you did a simulated install. That doesn't do anything, it just lists the things it would have done had it not been a simulation. Make sure you don't check the "Simulate?" checkbox when installing.

 

Maybe your log file is an older one? From before when it was working fine?

 

I did update my game and everything is working for me.

I believe I have the latest version installed. I installed again with the installer without checking the simulate button, to no avail.

[Origamiboy]

Can confirm it is not working for me either

[CPVC]

7 minutes ago, Origamiboy said:

Can confirm it is not working for me either

 

Bummer. Do you have a log file you could post?

[Origamiboy]

7 minutes ago, CPVC said:

 

Bummer. Do you have a log file you could post?

I wasn't actually running the right sims4 application I was running TS4_x64.exe by mistake you need to run TS4_DX9_x64.exe even if you add -dx9 to the shortcut and change it to dx9 ingame it doesn't matter. RTBP only detects TS4_DX9_x64.exe

[PAWGDUCKY]

Hey not sure if this is much help but I had the same problem but I was able to get it to work by going to the in game options and check the box "Direct X 9" then restart the game. That should get the tool working.

[Rol07]

On 5/21/2021 at 1:29 AM, CPVC said:

 

So, assuming you have a legitimate copy of the Sims 4, your log file is going to be at "C:/Program Files (x86)/Origin Games/The Sims 4/Game/Bin/RTBP/Log.txt".

The body replacements could be causing the problem. RTBP's vertex selection methods assume the default meshes are used.

 

[Rol07]

Please can anyone help me when i open the RTBP Commander it says unable to connect its not working for me

[CPVC]

7 hours ago, Rol07 said:

Please can anyone help me when i open the RTBP Commander it says unable to connect its not working for me

 

The Sims 4 needs to be running and RTBP needs to be correctly installed. In the Commander, you can click "General > Start the Sims 4..." to start the game. The Commander should connect eventually.

[hackerjsimon]

Been trying to get Butt physics to work during WW animation, but it doesn't seem possible as it remains static when I use older, more stiff animations; the breast however seems to move.

EDIT: correction it does work, but during animations where the butt is moving a bit fast (old and stuff ones in specific), there isn't any jiggle effect instead it's a random small jiggle even if the sim is standing in a no movement idle animation.

Edited March 12, 2025 by hackerjsimon

[ReconUnitZero]

Wanted to check in if there's any hotfix for Eve.9 issue from earlier, as most new shirts or dresses I download from SMsims use the current Eve.v9 chest mesh which have the same problem with the physics, causing one of them to droop lower than the other. There are some other shirts and dresses which also have some similar issue of not fully having physics, leaving a detached clothing collar or neck area unaffected by the physics.

[CPVC]

On 3/17/2025 at 2:36 AM, ReconUnitZero said:

Wanted to check in if there's any hotfix for Eve.9 issue from earlier, as most new shirts or dresses I download from SMsims use the current Eve.v9 chest mesh which have the same problem with the physics, causing one of them to droop lower than the other. There are some other shirts and dresses which also have some similar issue of not fully having physics, leaving a detached clothing collar or neck area unaffected by the physics.

 

Not yet. This mesh is kinda funky. The left and right breasts don't have identical blend weights, so each breast is going to deform differently.

 

Examining the mesh in Blender, I see that the right breast is influenced by it's CAS bone much more than than the left is influenced by its bone. For example, at the tip of the nipple on the right breast, the right CAS bone weight is 0.578595. The corresponding vertex on the left breast for its CAS bone is only 0.5. This imbalance is consistent across most of the right breast, which is probably why it sags more.

 

Odd stuff. Maybe there's something I can do.