It seems there’s a one pixel either side blend when rendering a Cubemap from Corona camera override… the screen shots opened in Photoshop show the blended pixel. Granted, this is an extreme case but there shouldn’t really be any blending between orientations in a cube map.
Just as a note, the Corona camera override is deprecated, no real need to use it now, just use the Corona Camera. Does it still happen with that?
Yes, I was using the corona camera (it comes in as a tag on a regular C4D camera no?)
And yes, still the same blending 1 pixel problem on a Cubemap image
The disadvantage of “View Unread Posts” - sometimes you don’t notice which forum category you are in 
Didn’t spot I was in the C4D one here! Yep, a tag on the native camera is still correct in C4D.