Gives much better quality result but encoding is slower and there is a 25% memory increase in the physical texture
#ROBOMERGE-SOURCE: CL 8997086 via CL 8997134 via CL 8997199
#ROBOMERGE-BOT: (v442-8990807)
[CL 8997226 by jeremy moore in Main branch]
Previously RemoveLowMips didn't work correctly with StreamLowMips
#rb none
#ROBOMERGE-SOURCE: CL 8164420 via CL 8176718
#ROBOMERGE-BOT: (v401-8057353)
[CL 8177036 by jeremy moore in Main branch]
Add support for baking this with a button on the virtual texture volume
#ROBOMERGE-SOURCE: CL 8126394 via CL 8132086
#ROBOMERGE-BOT: (v401-8057353)
[CL 8157079 by jeremy moore in Main branch]