Blend if like Photoshop Photoshop blending options

I want to create something like blend if of Photoshop with sparksl to adjust blending of textures (layers)
Can someone help me, I searched a lot but couldn’t find a solution !!

I’m not super familiar with that feature, but this article says it’s basically just some fancy controls for luminance masking (AKA lumakey).

You can use luminance to convert the input to grayscale, then “To Range” to change the affected range. Then you use that result as the alpha channel before blending. Does that make sense?

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