Baked Lighting How-To

Question

SteveTalkowski OP

Created 2h

Replies 1

Boosts 3

Participants 2

This post is from the WWDC26 RealityKit & Reality Composer Pro Q&A.

Good Morning!

Following the RCP 3 lightmap workflow: I've added Lightmap components to my entities and hit Bake, but I get "Lightmap bake failed: no lightmappable entities found — enable Process for Lightmaps in an asset's Geometry Transform Settings." I can't locate that flag anywhere in the GUI, and my scene objects are prototype instances. Could you walk through the complete end-to-end setup for baking lighting: where the Process for Lightmaps flag actually lives (on the instance or the source asset?), whether lightmap UVs must be authored or are auto-generated, and how the Lightmap component relates to that eligibility flag?

Answer 1

Apple Designer OP

Apple

1h

Good morning!

You can find the Geometry Transform Settings by adding it as a new asset in the Project Browser via the context menu or the New Asset button in the top left of the Project Browser tab's toolbar.

I'll try to get a response for the other parts of your question, but that might not happen until later today.