My aim is to simulate a display in a given environment.
From start, my obj is a simple rectangle with the top surface designed as Diffuse material with an Emission designed as texture Emission . Emission distribution is set to greyscale and an .ies file corresponding to a display emission (for example emission limited to 20° for narrow angular display).
My wish was to superpose 3 such displays (one for each R,G,B canal with different .ies file for each one) so as to simulate for any color....and even further to use the "efficiency of texture" set to greyscale image to simulate for any image on a display.
The result is not the one expected especially because (I think) I don't correctly manage the "UVTransform" , "projection" and "projection- coordinate space" parameters of the Emission/Texture Emission node..but I can't find details on them .
Can anyone help me settle correctly those parameters for the above purpose.
Thanks a lot for any help.