Hi everyone! I have the following problem: We do have the need to render high quality soft shadows which we can achieve using PCSS. As you know does this have a major performance drawback, especially on mobile devices. The problem is that we cannot pre-bake all shadows in blender as we have semi-…

It should be possible to render the shadow in UV space and then use that as a lightmap. You’ll need to do the uvunwrap in blender and export the scene but it should be possible. Might be possible with a material plugin? cc @Evgeni_Popov

@labris we are currently using spotlights and no directional lights (so light.autoUpdateExtends = false has no effect - but it obviously also doesn’t solve the issue when we use directional lights).

@Cedric I’m no entirely sure how to go about that as I didn’t find a way to somehow read the filtered shadowmap. Could you point me into the right direction?

Actually, there is already something available in Babylon. Babylon.js docs So, the idea is to render to UV Space with the shadow applied. and then use that rendered texture as a lightmap. [image] Lightmaps Workflow teacherTutorials and…

I tried to make a simple shadow baker example: Babylon.js Playground Babylon.js playground is a live editor for Babylon.js WebGL and WebGPU 3D scenes The bunny is rendered in a separate RTT with a special material which renders the shadow component into mes…

Bake PCSS shadow

Questions

labris January 21, 2025, 5:07pm 3

This thread may help - Shadows rendering only once inquiry

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Bake PCSS shadow

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