Coloured mask channels

[Morne]

Hi guys

 

I mainly work with 32bit rendered EXR files. When I'm comping rendered objects into backplates, I need to be able to have coloured masks. This is to ensure shadows that are in alpha (masked), creates the correct tone on the backplate. A coloured mask can for example produce a blueish shadow, where a grey scale mask will produce a grey shadow.

 

Is there perhaps a setting I'm not seeing? Whenever I convert a layer to a mask, it goes greyscale!

 

[R C-R]

In Affinity all masks are transparency masks -- IOW, they have no color component & only affect the alpha channel of a layer. For editing purposes, they can be displayed as if they were grayscale images, but they are not grey or any color.