Hi Bill I've been testin VISAD for a month and I think it´s very useful. Now I´m trying to display a volume generated from a 2D image (color is the Z-coordinate). I have a program that generate a VRML 2.0 volume file from the 2D image. Now I´m trying to use the VRML triangulation (82174 samples and 154304 triangles) inside a VISAD program. If I use the DelaunayCustom class with the triangles and samples of the VRML file it delivers a "finish_triang" triangulation error. If use the DelaunayClarkson class (only with the samples of the VRML file) it delivers a memory error. Please, could you help me?