Quote Originally Posted by joeltcarontx View Post
I am wanting to use a catalyst to project onto a sphere and I was wondering what people are using for the actual projection surface/structure. My project would only require about 180 degrees of coverage. Hopefully, I can do it with only 2-3 projectors.

Thanks!
Joel Caron
I have done exactly what you are saying. I used two medium throw projectors with a 50% blend. The sphere was over the stage and we projected up from two poles on each side of the stage apron.

The location of the projectors was required to create an even field for the whole audience. The angles were about 40 degrees of axis (80 degrees between).

The extreme blend was to make sure that the spill off on either side was hidden. It took a lot of time to overlay the blend and apply the bezier distortion to get the image to line up correctly but eventually looked very very good.

In all honesty, you can do the same thing with a single long throw projector and have nominal uncorrectable distortion. In fact, in tests, a single projector looked good up to a 120 degree viewing angle.

We used weather balloons inside of a custom sewn cover.

Try a test on your own with something like a 2k projector on a beach ball in your shop. It's a quick easy way to test your thoughts.