These results are based on Corona latest official release : 1.00.02
After few hours of testing, I noticed that Dr server uses a string to start the 3dsmax process.
1 - a part of that string is "-gammaCorrection:1", this always gave me trouble so I did this little test and
patched the "DrServer.exe" file using a hex editor and changed the static string to ""-gammaCorrection:0"
like this :
2 - I also copied all the used maps to the folder "C:\Program Files (x86)\Corona\DrServer\drData\"
this is where Corona copies the scene.
these 2 steps solved the problem !
I'm just confused why 3dsmax couldn't locate the maps even when I placed them in a shared folder, the
first bug makes sense because it was forcing max to use gamma correction.