Hi, I'd set up some files in B1 (mac). When I've gone to make some adjustments to them using the latest build and r20 it renders very differently.
There's a screengrab attached of the same file rendered in r19 B1 and r20 latest build.
It has a coloured pattern in the reflection slot - it seems to be reacting differently perhaps?
As a side note, it would be useful to run different builds of corona simultaneously (ie r19 with B1 for stability, plus r20 running the latest build for testing. Rather than having the installer overwrite all versions).