I've tried looking into the GLRayCaster-2D-*.glsl files, and GLRayCaster.cpp files.

However, I've no idea of OpenGL/ LuaScripting and want to pass a similar 3D-texture ( like the 2D-texture textrans i.e. passed ) into the .glsl files to define the color at a given voxel location.

If you could please guide, of as to how to pass a texture in the 2D-*.glsl files, I have a 3D-array containing the voxel color and want to pass it as a texture to assign color to the object ( as done at line 95 of GLRaycaster-2D-light-FS.glsl via the textrans texture )