Do PBR materials cause a significant amount of lag?

Hey there.

I was wondering if PBR materials (SurfaceAppearance/MaterialVariant) cause any noticeable amount of lag? For example, if I had a map that was textured using purely PBR materials and an untextured map, which would lag more, if at all? Would there be small, significant, or no difference?

Just wondering since I want my games to look good while still being optimized.
Thanks.
:+1: