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« on: 2023-10-22, 10:23:45 »
Hello,
I'm testing 3 textured glass materials for a project. I'm making 3 boxes and I'm texturing: one has lines, the second only roughness and the third a pattern of squares. I'm managing the pattern of the first and third with a normal map.
My problem is performance. My CPU (Threadripper 3970X) only runs at 60% when the windows are boxes, but returns to 100% when I replace them with simple planes. And I honestly don't understand why.
I've tried putting two planes one behind the other (one textured and the other not) > 60%.
A box with IDs where only one side is textured > 60%.
Thinshell on a box > 60%
Plane alone > 100%
In fact I have the impression that there's a problem as soon as there are two surfaces with refraction one behind the other and at least one of the two has a normal map.
Do you have the beginnings of an answer to this?
Thanks in advance.