Software for solar design. Help improve the explanation.

Step 3 What I have done so far. (Educational I hope). Apple Optics!

Imagine you are the sun, looking down on your solar reflector, what will you see?
Answer. You will see (more or less) the reflection of the cooking pot reflected back to you from the reflector to you. This is useful because you can set up cameras in your scene to take pictures of the dish from different angles. How does the reflection change over time? What will a reflection from a hemisphere look like? What will the reflection from a parabolic dish look like? And after an hour when the sun has moved 15 degrees, what will the reflection look like?
In art of illusion,
I have done preliminary pictures of 5 different dishes with the sun moving 5 degrees (20 minutes) at a time and the results will surprise you!
When the people on the art of illusion forums saw my poor camera setup and pictures, I got help setting up a camera that "flies across the sky" and takes a series of pictures or a quicktime movie of each dish!
More work has to be done of course but take a look at the next page for the first results and downloads. Below is the physical proof of the concept with an apple and a 60 degree compound parabolic model.