Per the title. If you set “renderingGroupId” to anything other than 0 for any mesh, it will mess up order independent transparency for the entire scene. Disable line 11 (scene.meshes[0].renderingGroupId = 1) to view the correct behavior. Babylon.js Playground Babylon.js playground is …

You should move all transparent meshes to the same rendering group. Only moving some and not others won’t work as expected: Babylon.js Playground Babylon.js playground is a live editor for Babylon.js WebGL 3D scenes

Hello, welcome aboard! It doesn’t make sense for me to set the hdrSkybox’s renderingGroupId to a value higher than the the loaded model’s meshes renderingGroupId values. The skybox has to be rendered first. Babylon.js Playground Babylon.js playground is a live editor for Babylon.js W…

Right, ignore that I was setting the skybox, that was not intentional (just typing too fast). Your updated demo showcases the issue also though. See how the dragon and the red sphere (with the modified rendering group ID) are rendered correctly. However, the other objects in the scene are no longer…

If you look at the stripes on the spheres, the two spheres with the “X” on them look like they are only rendering the backfaces of the mesh. You can only see the stripes going in one direction.

"renderingGroupId" breaks OIT for the entire scene

Bugs

Evgeni_Popov January 5, 2023, 1:51pm 5

You should move all transparent meshes to the same rendering group. Only moving some and not others won’t work as expected:

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"renderingGroupId" breaks OIT for the entire scene

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