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How to handle channel selection for custom filters?

Contributor ,
Jan 25, 2023 Jan 25, 2023

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Hi, I'm using a custom filter in Sampler on top of a metallic material. Regardless of how I configure my filter (with opacity output, opacity in the alpha of the basecolor, black metallic channel) I have the metalness of the base material applied to what my filter is generating. I.e. I cannot get rid of the metalness of the base layer. Any idea how I can set up my filter to prevent this?

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correct answers 2 Correct answers

Adobe Employee , Jan 26, 2023 Jan 26, 2023

Hi,
It will help to understand if you can give some screenshots of your project in 3D Sampler.
Do you want to get rid of the metallic of the base layer entirely or depending on some parameters of your custom filter? 
It will be great to show the graph of your custom filter, I think you'll need to work on how it handles the metallic input. 

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Contributor , Jan 27, 2023 Jan 27, 2023

Thanks! I thought the opacity channel alone would act as a mask for other channels, but this is not the case. So now I am masking each channel individually and it works!

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Community Expert ,
Jan 26, 2023 Jan 26, 2023

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I think you are asking for customizing metalic of the material. In my screenshot I have applied "Color Variation" filter on material. After choosing Metallic material in drop down list in property panel you can use custom material and apply that filter to metallic. 

Screenshot 2023-01-26 153708.jpg

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Contributor ,
Jan 26, 2023 Jan 26, 2023

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This is not really what I am looking for, but maybe there is a connection to this. Here is my question formulated differently: is there a way to mask part of a layer (all its channels) using the opacity channel of a custom filter?

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Adobe Employee ,
Jan 26, 2023 Jan 26, 2023

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Hi,
It will help to understand if you can give some screenshots of your project in 3D Sampler.
Do you want to get rid of the metallic of the base layer entirely or depending on some parameters of your custom filter? 
It will be great to show the graph of your custom filter, I think you'll need to work on how it handles the metallic input. 

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Contributor ,
Jan 27, 2023 Jan 27, 2023

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Thanks! I thought the opacity channel alone would act as a mask for other channels, but this is not the case. So now I am masking each channel individually and it works!

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Adobe Employee ,
Jan 27, 2023 Jan 27, 2023

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Happy to hear it! 

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