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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!

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  • $\begingroup$ Under your Material Panel >> Settings >> Surface... Is your Transparent Shadows option checked? $\endgroup$
    – Rick Riggs
    Commented Mar 9, 2016 at 22:39
  • $\begingroup$ Yes it is checked. Sorry, forgot to mention that. $\endgroup$
    – Seb
    Commented Mar 9, 2016 at 22:53
  • $\begingroup$ 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? $\endgroup$
    – Duarte Farrajota Ramos ♦
    Commented Mar 9, 2016 at 23:56
  • $\begingroup$ 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. $\endgroup$
    – Seb
    Commented Mar 10, 2016 at 8:09

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