Hi everyone, I’m struggling with this problem since days. I think I looked everywhere for a solution but I didn’t find any.
I have a spline with multiple meshes attached and everything works like I want but one thing:
I added a spline mesh component, his material is emissive and I would like to hidden it in game while keeping the emissive light in game. I already enabled: Hidden in game, Affect Indirect Lighting While Hidden and Emissive Light Source. The result is: I can see the mesh and his emissive light in the level map, but when I play the game I can’t see the mesh (as wanted) and the emissive light.
I’m a total beginner and I have a limited knowledge of UE, but I really need to know if there is a solution to this. If screenshots are needed I’ll try to attach them in the follow answers.
I’ve been testing what you mentioned (UE 5.4.2), and it seems that the “Affects Indirect Lighting While Hidden” checkbox doesn’t work properly with Spline Mesh Components—but it does work fine with Static Mesh Components.
A possible workaround is to convert your splines to static meshes, especially if your goal is just to use them for lighting and not render any actual geometry. There’s a built-in tool for this in the editor, and it also helps optimize by merging everything into a single mesh. Here’s a video showing how to use it: https://www.youtube.com/watch?v=Tr8SlLqX2XM
Lumen & Emissive Materials: 