Rendering R8 texture as grayscale

[B-LechCode]

Hi,

I would like to render a texture of R8 format (and other single channel type textures) as grayscale image with notan.
Is there a direct way to do that?

I tried to search the documentation, but I couldn't find anything regarding that.

[B-LechCode]

I did overcome this by writing a new shader for this. If that's the intended way to go, this can be closed.