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I am encountering a rendering issue I can't really explain in Max2020 using Arnold. I will try to use screenshots to explain better, since I don't really understand what exactly is happening in my test renders.
I have a car model, and currently set the material for the headlight's glass to a glass type semi transparent Standard Surface. It is a reflective material with 0.6 for transmission
This is how the material looks when I test render. I tried to take screenshots from different angles to illustrate it better. It seems to be having an Xray kind of effect, as I end up seeing a bit of the other headlight from the inside, or extra thru the entire car into the black BG.
Thing is... if i move the "glass" element up, it works right when next to the other parts of the car. It renders as a semi transparent clear glass
It seems it is only rendering strangely when next to the interior headlight mesh. The glass and the interior both render correctly when separated.
Do you have enough rays on Ray Depth for transmission? Also, if you use a Transmission of 1, what is the result?
I am not familiar with Ray Depth? Is it the depth here in the transmission options?
It is exactly the same as with transmission one. I actually lowered the transparency so I could show it working when next to the other parts of the car
It will be hard to see the glass element when I raise it up with a full transparency. But its there, rendering correctly if next to the hood/windshield, just not when against the headlights interior.
Its really bothering me because I have another model with pretty much the same material settings and mesh, and this one works with no problem
Is there any chance you can send me just the glass geometry?
okay so I cant really explain what happened, but when I detached the element from the whole mesh, it worked!
this is the glass as a separate object, and its rendering correctly.
the other glass is still attached to the main mesh, and still renders incorrectly
It solves the problem for this model, but doesn't really reveal the problem.
The other car model, the glass elements where attached to the main mesh, but rendered okay.
That was my idea, that it was related to the geometry. You could compare the two cars and see how the geometry is different.
Try giving the glass a thickness. I think that when it is attached to the car geometry, Max is treating it as a volume instead of a thin surface. So you're getting some extra refraction, like looking through a drinking glass full of water and what's behind is distorted. Or maybe having it as a separate element, not welded to the rest of the model but still attached, would work.
Chris Medeck
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