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The same as this question probably.

Here is the setting:

  • Two cubes which overlap (so, I know, they are "z fighting")
  • One cube with diffuse
  • The second with transparency

I was expecting the transparency won't be mixed here, but to see only the blue cube, because a transparent object should stay transparent (?).

Is it possible to avoid that without changing the cubes' positions?

enter image description here

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lemon
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  • No I don't think it is, the solution is really not to have overlapping geometry, no render engine likes that really, and most deal with it pretty badly as far as I know, unless both objects have exactly the same material. Why would you want overlapping geometry in the first place, if I may ask? – Duarte Farrajota Ramos Mar 06 '17 at 19:15
  • Thanks for this comment, @DuarteFarrajotaRamos, I don't want overlapping geometry, but I'd like 'overlapping geometry safe' solution for this issue. – lemon Mar 06 '17 at 19:22
  • Only workaround I really know is that if both objects use a similar shader or material color the Z Fighting becomes less visible or unnoticeable – Duarte Farrajota Ramos Mar 06 '17 at 19:26
  • @DuarteFarrajotaRamos, could you elaborate more this last comment? FYI, each cube here has its own material... so how can be understood 'similar shader'? – lemon Mar 06 '17 at 19:31
  • Nothing too elaborate, just mentioning that if both cubes were blue colored then you can't really see the Z fighting between them. – Duarte Farrajota Ramos Mar 06 '17 at 19:42
  • @DuarteFarrajotaRamos, sorry but I don't understand your comment. One cube is transparent (transparent shader), the other one is blue (diffuse shader). Could you explain what you meant? – lemon Mar 06 '17 at 19:53
  • If both cubes were to use the Blue material, instead of one being blue and one being transparent then you would never see any Z fighting, but of course it might defeat the purpose because both become actually visible. – Duarte Farrajota Ramos Mar 06 '17 at 19:55

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