I have been looking thru the forums, and was wondering if anyone has attempted to create a volumetric renderer. I am interested in implementing the Horizon Dawn Volumetric Clouds system, and if anyone has a head start on it, would jump in on it, otherwise, would will start from scratch.
For IOGRAM, I hacked together a material/shader combo that requires a box and a 3d texture. The shader renders the volume texture using some nice tricks. The advantage of this is that it fits in well with the existing render pipeline (i.e. you can easily control visibility/occlusion).
Also, I wrote some code to combine sequences of images in to a single 3d texture, and even modify the 3d texture directly.