Landscape material rendering question

I have weight blended layers on a landscape, let’s say I have 5 layers, and I only painted 2 of them on a landscape component, but the landscape still has 5 layered material, so the question: does the other 3 texture layers still cost the expenses on the gpu, or does the computer only drawcall the 2 used layers when rendering that landscape component, it’d be much help if anyone knows, thanks.

Hello SongOfDeath,

I believe the layers that are painted are the only ones being called. I do not believe the other 3 will be an expense on the gpu.