I have a pyro sim with "Treat as light source" set on in both the shader and rendergeosettings node. This only appears to work in CPU. Does this work on XPU? H20.0.590.

According to docs [www.sidefx.com] not yet for volumes or curves

For now you may need to render it as emissive volume with diffuse or volume limit at least 1 for each object you want to get illuminated or as global settings