Rigid Body 'Collision Group Mask' not working in Blender 3.6.5

[wikid24]

Hi,

I don't know what I am doing wrong, I cannot get 'Collision Group Mask' to ignore some rigid bodies.

These breasts/ oppai (collision group 2) will still collide with the arms/hands (collision group 0), even though they are both set to ignore eachother.

Screenshot:

Video:
https://github.com/UuuNyaa/blender_mmd_tools/assets/19479648/bd5cb8b3-748d-48a4-a1f6-48eacb5c2ed7

Sample File:
collision_group_mask_defect.zip

[fmnijk]

There are no Collision Group and Collision Group Mask in Blender now. Now it's called Collision Collections. Please use Collision Collections setting in Rigid Body settings.

[wikid24]

Thanks, I never knew that! If MMD Tools is not doing it right now, then it need to get updated with a translation layer.

3.6 API documentation: https://docs.blender.org/api/3.6/bpy.types.RigidBodyObject.html#bpy.types.RigidBodyObject.collision_collections
4.0 manual documentation: https://docs.blender.org/manual/en/latest/physics/cloth/settings/collisions.html

Will play around with the settings, but this is needed-- especially for all the models I convert to MMD while in blender.

[nagadomi]

Collision Group Mask is a PMX property. mmd_tools translates it to Blender's Rigid Body Constraints.

@wikid24
Maybe it is a problem related to Non-Collision Distance Scale.
Clicking on Model Setup > Assembly > Physics and set Non-Collision Distance Scale to 10 on Build Rig operator panel should fix it.

[wikid24]

Thank you for the feedback @nagadomi ! I am sorry I must be blind, I see that this is mentioned on the Documentation Website But I cannot find 'Non-Collision Distance Scale' anywhere, I even checked on Blender website:

[nagadomi]

@wikid24

[wikid24]

Thank you, this fixed it! :)

This property is not exposed anywhere on the UI, it would be good to have this actually visible somewhere since it is very easy to miss. There is also no screenshots of it on the website)

[wikid24]

After video:

105C.Bikini.60Fps.Blur.W.Hair-00.00.19.740-00.00.27.061.mp4