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Black lines on white planes?

This problem has persisted since I begun this project, which, due to many problems, I have not worked on and will continue to not be able to finish, but the problem that persists is that my project involves a long octagon which the player is in, made of many, many 1 polygon planes, which are made of a white, unlit material.

Whilst playing, weird black lines appear between the meshes that are perfectly next to eachother, I thought "Ok, maybe there are some mathmatical problems that make these differences in polygons make lines, so I tried increasing the size of the planes, so they overlapped, but I still see black lines?!

Sorry I can't provide any images, but everytime I press screenshot, it always takes one when there aren't any lines :(

Product Version: UE 4.8 Preview
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asked May 29 '15 at 03:39 PM in Rendering

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Oscar Cooke-Abbott
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Could it be due to the ambient occlusion?

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answered May 30 '15 at 10:51 AM

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avatar image Oscar Cooke-Abbott May 30 '15 at 12:45 PM

Ah no, sorry, I forgot to mention I have a post process in the scene which disables AO. Also AO wouldnt do this. But thanks for trying.

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