wip Real-Time Body Physics

[CPVC]

Real-Time Body Physics

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Real-Time Body Physics is a highly experimental mod for the Sims 4 that attempts to add real-time body physics to sims. Currently, only the breasts and butt are targeted, but other parts could be added in the future.

 

The mod works via a fake DirectX 9 DLL that behaves just like the real deal, but injects a little extra code into the rendering loop (See: https://en.wikipedia.org/wiki/Hooking). The source code is included for those that want to see how it works.

 

Please read the included "README.html" file before using this mod. It explains how to install, configure, and control the mod in-game.

 

Note for those with an Intel GPU:

 

You'll need to tweak a Sims 4 configuration file for RTBP to work. Go to your game installation directory + "/Game/Bin/" (the same place you put "d3d9.dll"), and open the file "GraphicsRules.sgr". Find the line that says "setProp $ConfigGroup EnableSoftwareSkinning true" (for me it was on line 117) and replace the part that says "true" to "false".

 

This will enable hardware skinning for Intel hardware and allow RTBP to work.

 

 

Bonus: If you'd like, you can try out the super duper, highly experimental, RTBP GUI tool that allows you to Alt+Tab out of the game and change settings on the fly via the RTBP Command Server using a user friendly GUI interface:

 

 

* Screenshot is out of date.

 

The RTBP GUI Tool is a work in progress and more features will be added soon. Beware that you can send values to RTBP that might break it and cause body parts to disappear.

 

 

Bonus 2: Having a bit of trouble installing RTBP? Try out the RTBP installer. Just select the RTBP zip file you'd like to install, your Sims 4 installation directory, and your Sims 4 mods directory. The RTBP Installer will attempt to automatically detect these paths, so if you're unsure, I recommend going with the default values.

 

Update 2023-11-11: The new versions of the RTBP Commander and Installer have been bundled to save space. Note that this version of the installer is incompatible with older versions of RTBP. Download both of them here:

 

RTBP GUI Tools 2024-04-12.zip

 

 

Update 2023-04-01: Origin has been depreciated and replaced with the EA App. The RTBP installer will no longer look for your Sims 4 installation in the Origin game directory.

Update 2023-03-24: Added the EA App game installation directory to the list of potential Sims 4 game installation directories. The requisite libraries required for RTBP to function will be individually tested during installation.

Update 2022-08-13: The RTBP Installer should now detect when GShade is installed and make the changes necessary for RTBP compatibility.

Update 2022-07-26: Improved logging.

Update 2021-11-18: The RTBP Installer now has an uninstallation wizard.

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• Submitter
  CPVC
• Submitted
  09/01/2020
• Category
  Extensions
• Requires
  The Sims 4 (64 bit)

 

Edited December 13, 2021 by CPVC
Outdated screenshots disclaimer added.

[youngmusclefan]

does this affect mens' butts too or just womens'?

[IfYouOnlyKnewMe]

When editing the description, I'd suggest hitting that "View File" link/button at the top of your first post and editing it there. (The View File button will look like a Link like it does now otherwise)

[CPVC]

29 minutes ago, youngmusclefan said:

does this affect mens' butts too or just womens'?

Yes it affects both unfortunately. I'd like to add an option to turn it off based on gender, but I haven't found a way to distinguish male from female meshes yet. I'll work on it.

[R3ACT3M]

The future is now old man!


As cool as this is and excited to see its further development, will this conflict with sex animations? 

Also if possible and based on the videos tone the jiggle WAAAAY down (or at least make presets for different tastes)

But keep at it! Looks super promising already

[2cool4u_1]

4 minutes ago, Skyrim4DERS said:

will this conflict with sex animations? 
....
Also if possible and based on the videos tone the jiggle WAAAAY down (or at least make presets for different tastes)

It adds to the animation, whether or not the animation has breast movement. The jiggle in the videos are for demonstration. You have the option to adjust some of the settings yourself, so you can customize it precisely to your tastes.

[CPVC]

39 minutes ago, Skyrim4DERS said:

The future is now old man!


As cool as this is and excited to see its further development, will this conflict with sex animations? 

Also if possible and based on the videos tone the jiggle WAAAAY down (or at least make presets for different tastes)

But keep at it! Looks super promising already

Yes, the default variables for the physics simulators really do need to be toned down a bit. Honestly, I haven't spent a lot of time tuning them. I was hoping one of the beta testers could play around with the values and suggest some that were reasonable.

 

You can change them by editing the Settings.ini file or through the cheat console if you installed the optional cheats mod. Note that the cheat console method doesn't work in Create A Sim. Script mods don't get loaded until you're actually in game.

 

In the future, I'd like the variables to be computed automatically based on the actual physical characteristics of the body parts. For example, bigger breasts are going to have more mass than smaller ones.

[Cataclysimz]

2 hours ago, CPVC said:

Yes it affects both unfortunately. I'd like to add an option to turn it off based on gender, but I haven't found a way to distinguish male from female meshes yet. I'll work on it.

Why "Unfortunately"? Lol. This is a good thing. I'd say you're better off focusing on improving other aspects of the mod. 

[R3ACT3M]

4 hours ago, 2cool4u_1 said:

It adds to the animation, whether or not the animation has breast movement. The jiggle in the videos are for demonstration. You have the option to adjust some of the settings yourself, so you can customize it precisely to your tastes.

ah okie

 

3 hours ago, CPVC said:

Yes, the default variables for the physics simulators really do need to be toned down a bit. Honestly, I haven't spent a lot of time tuning them. I was hoping one of the beta testers could play around with the values and suggest some that were reasonable.

 

You can change them by editing the Settings.ini file or through the cheat console if you installed the optional cheats mod. Note that the cheat console method doesn't work in Create A Sim. Script mods don't get loaded until you're actually in game.

 

In the future, I'd like the variables to be computed automatically based on the actual physical characteristics of the body parts. For example, bigger breasts are going to have more mass than smaller ones.

When ever I mod Skyrim I go for firm booty physics and, firm-a bit of jiggle. The difference is that sims are more like people than big titty nords

I hope this mod does great things!

[LukePHils]

Do you have plans to do Penis Physics too? Kind of like Floppy SOS in Skyrim. 

[babblonin]

man ive been looking for smt like this for a long time, since there are like no currently working butt physics mods for the sims 4, id be happy to know if there are any others but this looks promising, might be one of the new top nsfw mods for ts4 in the future if it get tweaked some more, keep it up ?.

[CPVC]

6 minutes ago, The_FDS said:

I use Reshade and it uses the same d3d9.dll. Is there a way to change the name ? I tried to change the name of the dll reshade uses with ENBInjector.exe with no luck. If anyone can find a way to run both, let me know!

Put the Reshade d3d9.dll in the RTBP folder in "The Sims 4/Game/Bin". The mod looks for the "real" d3d9.dll there first before loading the system one, just for situations like this.

 

Please let me know if it works. I haven't tested it.

[JonGuiDoe]

22 hours ago, LukePHils said:

Do you have plans to do Penis Physics too? Kind of like Floppy SOS in Skyrim. 

I, too, would like to see floppy flaccid sim dongers ?

[IfYouOnlyKnewMe]

Both Male and Futanari Sims too!

[Kodenu]

On 9/1/2020 at 9:32 PM, CPVC said:

Yes, the default variables for the physics simulators really do need to be toned down a bit. Honestly, I haven't spent a lot of time tuning them. I was hoping one of the beta testers could play around with the values and suggest some that were reasonable.

 

You can change them by editing the Settings.ini file or through the cheat console if you installed the optional cheats mod. Note that the cheat console method doesn't work in Create A Sim. Script mods don't get loaded until you're actually in game.

 

I started playing around with the values in the Settings.ini and came up with some interesting results. Through experimentation this is what I came up with. These settings make the movements much less exaggerated and under control. The butt settings are very close to what I would consider more realistic. Watching them move up the stairs and the butt jiggle instead of wildly bounce all over the place is nice. I have the breasts better under control and still messing around with them somewhat. The frontal horizontal movement is still a bit excessive to me.  I'm sure as you advance on this some things will iron themselves out.

 

[rtbp.general]
startCommandServer=true
enableBreastPhysics=true
enableButtPhysics=true

[rtbp.leftBreast]
mass=0.5
damping=30.0
springK=200.0
maxLength=0.1

[rtbp.rightBreast]
mass=0.5
damping=30.0
springK=200.0
maxLength=0.1

[rtbp.leftButt]
mass=0.5
damping=8.0
springK=300.0
maxLength=0.2

[rtbp.rightButt]
mass=0.5
damping=8.0
springK=300.0
maxLength=0.2

 

[CPVC]

On 9/2/2020 at 1:48 AM, LukePHils said:

Do you have plans to do Penis Physics too? Kind of like Floppy SOS in Skyrim. 

Once I get everything perfected, I'll add physics to whatever body parts people want. I probably won't be adding any new body parts soon, because my priority now is squashing bugs.

[CPVC]

Squashed a major bug this evening. Hopefully bouncing fingers and faces will be a thing of the past now. Turns out I was looking for the bug in the wrong place.

[GarbageNameHere]

MEGA HYPE! (And ultra hopes for the best!) ?

[CPVC]

Might as well release a new preview.

 

You should (hopefully) encounter much less bugs. Breast detection appears to be near perfected. Butt detection less, so. Sometimes you still get bouncy fingers. Still working on that.

 

The Settings.ini file has been updated with more reasonable variables, but updating is optional. If you have your own custom variables, you can keep your old Settings.ini file.

 

I'll publish a new release with source code once I get the last few nagging bugs taken care of.

RTBP Preview 2020-09-05.zip

[Veoly]

On 9/3/2020 at 4:09 AM, CPVC said:

Put the Reshade d3d9.dll in the RTBP folder

Reshade don't work. It launches, and that's all. It does not detect its own shaders and presets, so it is completely useless.

[Sineadtanibata76]

Thank you so much for this!! More realism!!?

[CPVC]

17 hours ago, Veoly said:

Reshade don't work. It launches, and that's all. It does not detect its own shaders and presets, so it is completely useless.

Thanks for the heads up. It might work if you copied all the other Reshade files into the RTBP folder. I'll work on a better solution.

[SpaceMale]

Hi! This has a lot of potential!

I found a weird glitch with the animated textures. Depends on where the camera is. Without this installed its all ok.

Spoiler

[CPVC]

17 hours ago, SpaceMale said:

Hi! This has a lot of potential!

I found a weird glitch with the animated textures. Depends on where the camera is. Without this installed its all ok.

  Hide contents

Thank you for the bug report. Those are very appreciated.

 

So, I've discovered that the buggiest parts of my mod seem to all be related to butt physics. Would some of you mind testing this without butt physics enabled? Just set the "enableButtPhysics" setting in the "Settings.ini" file to "false" and tell me if you see any bugs. Thanks.

[nobodysfool]

Do I have to type anything in the game when I start to play to make it work? It worked in CAS when I was creating a sim but it didn't work during gameplay.

Is it neccessary to put source folder into Bin folder?

Is the breast bounce bigger when kspring is higher or lower than 150?