Vertex Color Mask??

Is it possible to write shader that uses vertex colors as masks. In example mesh has RGB colors and I want to apply specific texture or color to R, G or B part of mesh. I didn't found much info so If anybody knows how to do it I would love to get some pointers or even code snippets. Thanks

 

Bookmarked!

When I get some time, I can give this a shot for you if you like. It can't be that hard...

 

I would like your example mesh, if you can upload it for me, that would be great!
In the meantime, I will use my own mesh for testing.

EDIT: Do you get flickering on vertex colors? My mesh fllickers...

 

Thank you for helping Here is a mesh with vertex colors made in blender, exported as .Fbx

 

Thanks!

EDIT: I also worked out the flickering: DX11 obviously hates vertex colors...

My progress so far: I have got the red channel to mask the texture, but changing the mask color just fades out the red atm...

 

My progress so far: I have now got the Hue to shift and change the mask, but there is a couple of bugs still to iron out... Mainly to do with any other colour other than blue doing weird things...

EDIT: I now have to basically work out some sort of masking test that fails depending on what colour is set.