Hi, please watch this:
What can be the solution to eliminate those black reflections?
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Did you already try increasing the the path tracer max bounces and Max specular and transmission bounces ? The other one you can try is to make the objects not to cast shadows. Alternative try use Iray to render and see if the black spots are still there, I don’t think its a material problem as these black spots in reflections always got to do with light bounces.
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@pekka.varis
Hi Pekka and David:
I suggest using “clear” glass. I found other “glazing/tinted” shaders cause dark (black out) look when render in path trace but is correct if render in Iray. Attached is an image of each shader. Hope that helps. In clear glass property, it has refraction and Opacity setting. once I diminish opacity, cast shadow is not an issue and I can use path trace setting.
Frank
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@fsheng21 this is a great visual breakdown and to see the difference between the glass materials and their behaviors, Frank! i am sure archviz folks would love these type of comparisons.
the initial image depicts the blobs as fully metallic/reflective objects, so i wonder if he was imagining them turning to glass at some point, which would be able to leverage what you are showing here 👍. will have to ask Pekka himself 😁
but, question for you, does the window panes in your example have thickness?
@Simplychenable The glazing is an IGU. Two 1/4" sandwich with 1/2" air gap.
Another sample to the issue I was having with the glaze shaders.
I was experimenting with percentage of shading and amount of interior sun light.
Frank
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Hi @fsheng21 , thanks for the great comparison ! Really useful! Lighting is so much more realistic in Iray, I would even dare to say that I found Iray lighting better than V-Ray, too bad it is like 3x slower haha. :)