Oh, haha, MaCrea creates "Material Spheres" you could use in Zbrush or Sculptris. I made it for use in Sculptris, actually. However, I could easily make a shader for Verve that takes such sphere images, but two major issues are there:
1) it would kinda mess with my current solution a little too much and would really beg for me to add proper GUI elements for all of it.
2) I still don't have proper 16bit import, making it very messy with 8bit per channel images.
My plan has been to make a really nice lighting GUI, where then also a choice would pop up for Material Sphere Images like one can create in MaCrea, or rather...I'd just hook the whole thing into Verve. That way I'd also get around the image import mess, hehe...
Anyway, bouncing all about, "blooming" I only have in form of a Glow parameter that will make any pixel bloom as it goes hotter than 1.0 on any channel (>100%). Just fun, but I liked it a lot.