The explosion looks great -- especially the colors in it. I wonder if there's a way to make it less spherical, though.... Because it's so perfectly round, it does look a bit CGI.... Could you use the same process on some kind of deforming or morphing meatball? I'd also think about some kind of particles eminating from the explosion to simulate the sparks (burning iron filings) that pyrotecnicians use in RW explosions. I don't have Carrara, but you've inspired me to try new things in RD3D.....