Well I can't get the bl&&dy thing to work!!!
Did you do your dialing knob in C4D and render out from there Michael? I've got the material working ok but placing it is proving very frustrating.
Are there any general rules about sizing textures that might help. I know that in C4D the dial disc is 63mm diameter. Could I make a layer mask that has some relation to that and then scale it down
Here's my layer mask
And here is one of the 'results'. If I set the projection to flat or frontal nothing shows at all so this is currently set to cubic. So the distortion is probably a result of that.
I'll keep at it but it's getting very very time consuming just putting some text on that dial!!!
TIA
Adri