Hopefully someone on here can help!
I have been playing around with HDRI's and image based lighting etc but am getting stuck with the rotation of the IBL sphere. Im basically just compositing cg into a still photo, lighting the cg using IBL. When I put the HDRI onto the IBL sphere (working in Maya) obviously the rotation of that sphere effects the outcome of the lighting on the cg object. For example if you have a strong light source coming from the right in reality, when you get IBL going in maya how do you make sure that it is rotated so that that strong light source is also coming from the exact same angle from the right? Is it just rotate the sphere until it matches? As that can be difficult to tell if there isnt a strong obvious shadow to help match up. Or is there some technique that I dont know?
I hope that makes sense!? If not let me know.
Thanks in advance,