Hi all,
I’m running a render with rtrace but im getting weird results, almost like self reflections, whenever ab is > 1. Any clues what it might be?
Found the error. My reflectances were 60.0000 instead of 0.6000 . Keeping the post here in case anyone else makes same stupid mistake 
ab 1 looks fine. (exposed to a 10k lux overcast sky and pfilt -1 -e -10 for exposure)
Same image with ab 2 (exposed to a 10k lux overcast sky and pfilt -1 -e -10 for exposure)
Same ab2 image with -e -15 in pfilt. Notice self reflections under ceilings.
It almost looks like it’s an inverted image!?
-ab 3 even more visible:
mkdir -p ~/MantaRay/TestFolder/images/
mkdir -p ~/MantaRay/TestFolder/ambientFiles/
vwrays -ff -x 750 -y 375 -vf Perspective2.vf -pa 1 | rtrace -as 0 -ab 3 -aa 0 -ad 16 -af ambfile2_2023_03_30_2218_42.af -w -n 63 `vwrays -d -ff -x 750 -y 375 -vf Perspective2.vf -pa 1` -ffc -e 2023_03_30_2218_42_Perspective2_render.err Scene_Overcast10klux.oct > 2023_03_30_2218_42_Perspective2_render.hdr
