[Chimera-users] graphics performance: amira v. chimera

I loaded a MRC file, isosurfaced it, gave it a transparency around 0.48, and generated a vrml in chimera. I loaded the vrml into amira. initial comparison: I reloaded the vrml into chimera, I turned off the fog on chimera, moving the object around the refresh rate seems to be around 8 fps. On amira it seems to be around 24fps. results: The graphics on Chimera seems to be better during the rotation of transparent objects: full rotation in chimera is flawless, full rotation in amira results in flipping of the object (vertices in back quantum-ly jump to the front, front vertices go to back, looks like a z buffer error) periodically at 180 degrees, making it useless for many camera positions. Any comments or suggestions?