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I'm trying to fade out an object by using a transparency BSDF. With Transparency set to 0 it looks like:

Transparency set to 0

When turning the transparency up to 100% to get the structure opaque I get this result:

Transparency set to 100

I have no idea where those dark areas are coming from. The mesh I'm using has been imported from an obj file and was originaly created with a CAD software. I have tried to recalculate surfaces and removed all doubles, but I'm still getting those dark areas.

As I want to use it in an animation I think I could turn up transparency and just before it should go 100% transparent I'd set a keyframe on Restrict Rendering in Object Explorer, but I think it still might look a bit "harsh".

Does anyone has an idea, what could be wrong?

Thank you!

Seb
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  • Under your Material Panel >> Settings >> Surface... Is your Transparent Shadows option checked? – Rick Riggs Mar 09 '16 at 22:39
  • Yes it is checked. Sorry, forgot to mention that. – Seb Mar 09 '16 at 22:53
  • There is a mix shader with an unconected socket, could that be causing so sort of trouble, vene though the next mix node is ignoring it? – Duarte Farrajota Ramos Mar 09 '16 at 23:56
  • Gandalf3 is right. His question "Black artifacts when looking through many transparent objects?", is about the same problem. Thanks for the help and sorry for the duplicate. – Seb Mar 10 '16 at 08:09

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