Results obtained with the system for real-time rendering of time-varying volumetric data (animated voxels) I developed as part of my dissertation for my M.Sc. in Computer Science in Interactive Entertainment Technology. View aligned cut-planes are used to sample the data volume using texture coordinates calculated dynamically depending on the orientation of the volume relative to the camera. Rendering of large datasets that require streaming from external storage is accelerated taking advantage of GPU supported fast volume compression/decompression. The system was developed in C++, with GLUT/OpenGL and Cg for the shader programs.