aiStandardVolume attenuation

[nazaraltorv]

With aiStandardVolume shader replacing aiVolumeCollector, I was wondering, where have all the attenuation parameters gone and how are they dealt with in new shader. Release notes don't seem to elaborate on these changes too much either: https://docs.arnoldrenderer.com/display/A5AFMUG/2.0.0

https://docs.arnoldrenderer.com/display/A5ARP/5.0.0.0

https://docs.arnoldrenderer.com/display/A5AFMUG/Arnold+5.0

[lee_griggs]

With Transparency, Density, etc you shouldn't need it.