Version working with loading 3D texture
Getting there, slowly...
Working version that loads a file and draws it on screen. Does not
render perfectly, but it's close.
Working with proper rendering.
Cleaned some code.
Code cleaning.
Removed uneeded shader code.
Well working version.
Fixed glitches in corners by increasing walk path length.
Fixed bug that appeared with stronger perspective.

Used qt_MultiTexCoord0 where qt_Vertex should have been used.
Further cleaning of shaders to minimal needed amount of code.
Reversed propagation direction (requires front-culled faces) to make the
shader more easily modified.
More code cleaning for the sake of simplicity.
Prepared for sharing on GitHub. Currently not reading information from
file.
Moved the intensity factor to the final expression.
Merge branch 'master' of github.com:dragly/volumeqt3d