Got a question for the experts, one which has left me a little stumped. As some of you may be aware, I posted some preset IBL's for Luxus on ShareCG. What I'm after is some way of creating similar presets which function under Reality 2.5.

The idea is simple. A 'null' holds an environmental map as an 'infinite' light source. A visible sphere is placed in the scene, similar to UberEnvironment, and is rotated and textured to match the environment map. The sphere is given a 'null' material so it can be used for reference freely without being visible in the scene itself.

Additionally, a sun without a sky is added and positioned to match the position of the real world sun on the image based light.

The result is an IBL which serves two purposes. Firstly, it acts much like a regular IBL would, in that it will tint the light colours emitting from it, and secondly it can act as a 'skydome' since the light being emitted will be visible. The file can still be exported with alpha to remove this 'sky' but it can also be exported without it to retain it, as an option.

Now that the lengthy explanation is out of the way my question is simple. How can I reproduce a similar preset designed for Reality 2.5? Reality supports IBL's, but there doesn't appear to be any way to visibly rotate them nor make them visible in the render.

Any advice would be appreciated.