So I'm trying to learn methods of Image Based Lighting (IBL) to aid in the ease of CG to live footage integration. I've only really done one so far (still image), as I just finally got a mirrored ball which is necessary to the process.
So this is the result.
The process: First, an HDR photo was taken of a mirrored garden ball. What this means, is that successive pictures were taken, on a tripod, at incremental shutter speeds of the ball. These images were then combined into a HDR image. This is done to better represent the large values of lightness and darkness that we can see with our eyes, and serves to make the lighting more realistic. A second photo was taken with no sphere in it, so I would have a blank area to try and add the CG to.
The first image was turned into a spherical map for use in maya (or Cinema 4D). The resulting map was placed on two separate spheres, one for lighting, and one for reflections. I won't bore you with technical specificity, but suffice it to say that this whole thing is a rather lengthy procedure.
I then created three 3D spheres and assigned to them different textures. Hit render, and shabam! You have the resulting image! I can't wait to try it out on some video...soon!
No comments:
Post a Comment