Alpha channel bug

Corona Corona for 3ds Max Issues
1

When render glass, in the alpha channel is displayed incorrectly in the refraction of the glass

sorry for my english)

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2

And how should it be? What is wrong?

3

If my cheap laptop lcd isn’t lying, there’s a slight grey gradient on the side windows. It might be a bug. Or maybe your windows aren’t 100% transparent?

4

If I’m right equilibrium is about those refractive objects that shouldn’t be solid white on alpha channel..?

5

Strangely, in the last build, alpha of refraction at all gray.
I think the mode “Alpha Channel → Always Solid” does not work.

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6

maybe i wrong, but i think refractive area must be white color
P.S. render PT+PT, illumination - standart (corona sun +corona sky), corona alpha 3(not daily build)

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7

It depends on the parameter, but it’s not work

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8

Polymax - you’re right. Thanks

9

I’ve fixed some bugs with alpha, nevertheless:

  • glass materials’ alpha is not pure black, because those have also reflection
  • when environment is visible through glass, the alpha should come out black, as it is on the columns in your example. Unless you change alpha mode to solid.