I want to use an image as texture, but only in a custom-made specularity of the object.
So, basically a normal diffuse texture, but with the specularity as a mask.
(I know I can connect an image to specularity color, but I want to control the masking seperately from the actual specularity. So, use another Phong-material to adjust the size of the mask)
Another shader question:
If I wanted a texture to effect just Hue, how would I go about doing that? I can extract Hue channels with the Pick_Channel shader, but they are outputted in grey only.
I would like something akin to Hue-layer-mode in Photoshop.