Hi,
I've recently started using Corona, having come from VRay.
When I attach my Roughness map exported from Painter (PBR Metallic Roughness) with a Corona Bitmap node to the roughness slot of my CoronaPhysicalMtl, my object renders far glossier than it looks in Painter, or than I'm expecting. I can get round this by using an OSL Bitmap Lookup node, or by pushing it through a Color Correction node, but I feel that that shouldn't be necessary.
What gives?
Additional info:
I set the Corona Bitmap node to Raw (this doesn't make any difference in the render and appears not to in the Slate preview image).
I know the difference between Roughness and Glossiness, and which of the two I'm using.