Hi David, my first suggestion would be to exploit the transparency features of Java3D doing volume vis stuff. Normally you are processing voxel data and integrate a density (or whatever) value along the intersection ray. This would work quit well, suppose you order the voxels back to front before displaying. The z buffer algorithm is no concept that solves visibility using transparency. My second suggestion concerns clipping features. Perhaps you are interested in doing probes that cut off an user defined region. OK! enough for today
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