Ok, I have done but any objects are wrong color, glossy... instead of skylight.LudovicRouy wrote:You need to use texture nodes-> connect in a material node -> then connect in the material inside your obj, your texture must be a floatimage (gray gradients are less memory consuming)
See the screen capture
download is free -> speedy . sh / Xajns / home-temp . rar (please remove all spaces since "speedy" until "rar") -- about my obj-mesh (my home but progress...

-walls white: from specular to diffuse
-orange: from glossy to diffuse
-green plane: from glossy to diffuse
-window blue-green: color from blue-green to black, roughness to 0, specular to 1 and index to 8
-grating white: color from white to black, from specular to glossy, roughness to 0.150, reflection to 1.7 RGB