[vtkusers] why volume rendering with 2d texture mapping much slower than 3d texture mapping?

[liu]

Hi everyone,

why volume rendering with 2d texture mapping much slower than 3d texture mapping in my computer?My GPU is 8800GT, I got 60fps using 3d-texture mapping,and only 7fps using 2d-texture mapping.It's so weird,any one knows?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20080725/163c8f3a/attachment.htm>