Issues which displacement maps

I'm using displacements maps in my model but they seem to have a weird quirk that when they render they have dark streaks running over them. I've attached an image which shows what I mean. Does anyone have any ideas what's going on?

Attachments:

Test Render.jpg, 2.6 MB

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Permalink Reply by Richcat on November 19, 2014 at 2:44pm

Hi Henry

I found this post on the sister site for accurender, which looks similar to problems you having, it was the model was to far from the origins. Link

I'm away from my machine till tomorrow to test this out. On few tests I did today I couldn't get it to replicate this but haven't tried moving it away from origin.

There is also mention of size, my first thoughts where walls not completely flat.

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Permalink Reply by Richcat on November 24, 2014 at 5:21am

From the test I did the one that was a long way from the origin seems to shows signs of what your getting, but with white not black shading.

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Permalink Reply by brooks john on December 4, 2014 at 9:44pm

i find this happens a lot when you have cut out in your texture with displacement. did you create a alpha bump map? or use the texture itself? only solution i have found is splitting the faces up or putting the same texture on the back face. or making sure you have a black and white displacement bump.