Vray bump and displacement only works on some parts
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Hello guys, been stuck in doing the render for a particular render. There are some parts of the render that do not exhibit any displacement or bump eventhough I have adjusted it couple of times (but there are some that show it eventhough same materials are applied). I have tried reverse face, orient face and even delete the whole block of geometry, redraw and reapplied the material but it still doesn't work. The following is a screen shots from my work:
I increase the displacement and bump just to exaggerate on the parts which work and which doesn't work. The particular materila that I wanted the effect to be on is the brick-like material in the picture. Please help as I have bee stuck with it for weeks and still haven't manage to come up with any solutions for it. Thank you in advance!
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I'm not aware of anything that prevents bumpmaps from displaying - and from the distance of your sample render it's impossible to see if there is any bumpmap effect.
However, there are some requirements to make displacement work:
Any mesh with a material with displacement must be isolated - displacement will not work if the displaced mesh is connected to any geometry that has a different material. This includes edges. So ensure you have isolated (grouped, or made into a component) the mesh you displace - and ensure you also check the material of your edges.) -
@thomthom said:
I'm not aware of anything that prevents bumpmaps from displaying - and from the distance of your sample render it's impossible to see if there is any bumpmap effect.
However, there are some requirements to make displacement work:
Any mesh with a material with displacement must be isolated - displacement will not work if the displaced mesh is connected to any geometry that has a different material. This includes edges. So ensure you have isolated (grouped, or made into a component) the mesh you displace - and ensure you also check the material of your edges.)How about those texture at the back? they don't really have the exaggerated form as the material at the front, or is the distance too far to see such exaggerated form? meaning the front and back of the geometry (let's say it is a square box), cannot be of different materials, otherwise the bump or displacement settings would not work? so in order to solve that now, I would have to group them individually?
Anyway, would forming group of objects within another group might potentially caused the same problem?anyway, thank you so much for your time. Looking forward to hear from you again!
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I don't remember all the details of displacement now. I'd suggest you set up some small test cases to see.
But I don't think you can have different material on different sides of the face. certainly not different displacements. Face normals matters greatly with displacement. (how the faces are oriented. You should verify that all your face normals are oriented properly - the front (default SU colour white) should be pointing outwards.) In general you should always have full control over your face normals, especially when rendering. Now and then, switch the SU style to display the faces in SU's default colours, you might even set the backside colour to a bright colour to make it easier to spot faces oriented incorrectly.
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