Token support to Auto Convert TX: texture lookup shaders (such as the Arnold image node) now support the conversion to .tx of the convert the entire set of textures to .tx (as defined by the <udim> token).
Adding or removing imagers does not trigger a render anymore: after a render pass is finished, adding or removing some imagers (all except the denoisers and the light mixer) modifies the output image without restarting the render.
Photometric lights for the light mixer: the Max photometric lights can now be added to light groups through the Arnold light group manager, and taken into account by the light mixer imager.
The light mixer now supports up to 256 light groups.
Changing some render settings that do not affect the output result doesn't refresh the IPR anymore.
Added support of undo/redo in the light group manager.