Hi everyone, I have a volume data which is 256*256*256 cube, and I found it very slow when ray-casting. And I notice the video memory usage is 74M. I want to compress it to an hardware-support compressed format (S3TC_DXT1 or S3TC_DXT3 or S3TC_DXT5), but I found no example demonstrate how to use it. I tried to use osg::Texture3D::setInternalFormatMode(osg::Texture::InternalFormatMode::USE_S3TC_DXT1_COMPRESSION), but the video memory usage appears same as before. My computer has a Nvidia Geforce 8800 with latest driver, 3D compress texture is support by this hardware. Could anyone tell me if another steps needed to use 3D texture compress? Thanks.
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