Apply alpha to color channel in COPs in Houdini

Apply alpha to color channel in COPs

transparent PNGs already have an alpha applied to C channel to get the same result for EXR files:

add alpha to color channel

add file node select the EXR file add premultiply node operation: multiply by alpha alpha plane: A scope: C then proceed with composite nodes ...

to remove alpha from color channel (in PNGs)

add file node select the PNG file add premultiply node operation: divide by alpha alpha plane: A scope: C

src

https://forums.odforce.net/topic/32147-rop-file-output-render-png-or-tiff-with-alpha-channel-instead-of-transparency/ https://www.sidefx.com/docs/houdini/nodes/cop/rgbatorgb.html