Change RenderGroup based upon hologram alpha.
Change RenderGroup based upon hologram alpha.

Fixes #44

Jazzelhawk/Starfall,INPStarfall/Starfall,Jazzelhawk/Starfall,Xandaros/Starfall,Ingenious-Gaming/Starfall,Ingenious-Gaming/Starfall,INPStarfall/Starfall,Xandaros/Starfall