Displacement-20 times longer render?

#1

Hi, i assign a material to a simple box(segments 1,1,1) and it takes 10 seconds to render. But when i apply a very simple displace map to the box, render takes like 3 or 4 minutes. So this is like 20 times longer…

I think if something was wrong with my parameters it would take too long in rendering box without displace map.

I tried using 5 different maps and all they are so simple.

Can anyone explain me why that happens?

Thanks.

#2

What renderer and what kind of displacement?

#3

without knowing what renderer and what settings you have the best answer I can give is when you add displacement , your mesh gets subdivided at render time so a box which has 6 polygons with no displacement could in theory go up to millions of polygons when you render with displacement. You usually have some kind of control as to how much your mesh gets subdivded.

#4

vray displacement e.g. is not multi-threadded. to that’s essentially calculated on 1 single proc.

#5

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