cinema4d R23 (although I've had the same issue in R21)
I've tried the typical reload texture button, using the node editor to unlink and then relink, completely clear the texture form the material and then re-importing it, hitting 'render materials' in the material box... I can't even think of what else...
what gives?
in fact, the material texture preview shows the correct file! But the general "material globe" does not and of course the render itself is not correct. I have to close and reopen the entire project every time I make a slight adjustment to the PSD/JPG/PNG. Or I save out another PSD/JPG/PNG every time I make a minor change...
please help