Use a tree structure to create a hierarchy of bounding cubes. You will get fewer voxels ... But the cell-skipping algorithm is NOT obvious (no matter what Geoff says) ...
Please record a sample of the sound 'jack' Use 44,100 sampling rate, mono ... If you see mostly black blobs like this, you probably entered the wrong ...
... on 2 are good for details (especially 'Computer ... The result is large binary file which the computer plays as a 'soundfile' similar to playing a CD. ...
Say 6 secondary rays per pixel. 100k objects; 10 ops per intersection ... Enclose objects inside a volume with a simple intersection test (e.g. a sphere) ...