ART Renderer Enhancements - visibility, light exclusion.

[leeminardi]

I appreciate the goal of the ART Renderer is to keep things simple.  It is probably a very good choice for static scenes of “real world” objects.  It isn’t good however for dynamically changing visibility or for scenes where you need to fudge geometry scale (e.g., images of a space station above earth).  Making objects invisible by changing their transparency and other optical parameters can be used if there are a limited number of objects involved.  For more than a few objects the inability  to dynamically see the changing visibility in the editor is a problem.  Bottom line,

1. Include support of a visibility track with the ART Renderer.
2. Enable the user to exclude/include specified objects for lights.

[gmote]

Turning off visibility of objects and having them still render is also a problem with ARNOLD. Not a problem with Mental Ray but Mental Ray no longer available in 2018. I really need the ability to turn on/off visibility in ARNOLD and ART.