Dear maxwellS5D,
thank you very much!
The Nebula’s Lightsource-Actor and -Materials are intended for the creation of the static Nebula-Texture. The creation-process has to run to update the light’s parameters and position in the Nebula structure. But animating these is only applyable for veeeery slow animations or some baking for cinematics.
But there are some testings for dynamic lighting in the renderer. In “RenderNebula_Mat” and/or “RenderNebulaBuffered_Mat”, you may replace the “NebulaRaymarchDistancefield_MatFunc” with “NebulaRaymarchDistancefield_DynLight_MatFunc”. In the event-graph of “NebulaAndStarfieldV2_BP” you may notice the “ApplyDynamicLightExample” function as an entry point for your goals. But remember, dynamic lighing is still something experimetal here and some arthefacts may appear within a homogenous structure!
So have fun and good luck, anyway keep asking 