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Nataliya Tsygankova avatar image
Nataliya Tsygankova asked ·

Layer color replacement

I am trying to mix two standart shaders with different layer modes, but the new Arnold system doesn't provide Layer color anymore. Now the option is layer_rgba and layer_shader. But in layer shader there is no option for layer mode and alpha . How to resolve this problem?

https://docs.arnoldrenderer.com/display/AFCUG/Layer+Color

layer
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Stephen Blair avatar image
Stephen Blair answered ·

Right, standard surface returns a closure, not a color. So if you want to use those types of layer operations, you have to use layer_rgba with RGB inputs.

00:00:00  1082MB WARNING |  unable to connect standard_surface() to osl(param_TopRGB) - types are not compatible (CLOSURE to RGB)
00:00:00  1082MB WARNING |  unable to connect standard_surface() to osl(param_BottomRGB) - types are not compatible (CLOSURE to RGB)


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thats the point, it used to be that layer color could mix both rgb and closure. I am watching different tutorials now, where it is shown how to make shaders and in most of them they are using layer color

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This has changed in Arnold 5 when closures were introduced. Before that you could mix a texture with a surface shader, but not any more. It has technical reasons, don't want to go into details, but now _rgba shaders are used for textures, _shader shaders for surfaces.

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rachid Hadj Abderrahmane avatar image
rachid Hadj Abderrahmane answered ·

@Mads Drøschler
OSL Composite does not support closure connection !

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I thought this was shade space.

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Mads Drøschler avatar image
Mads Drøschler answered ·
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Stephen Blair avatar image
Stephen Blair answered ·

How about mix shader ?

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There is no possibility to make overlay , screen etc mode or alpha operation

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