This ray traced image was created by John-Paul Gignac for his 
cs488 project (Spring 1994).

The ray tracer was a constructive solid geometry ray tracer 
that implemented
	1. Texture maps
	2. Depth of field
The leaves are a texture map of a leaf image onto a square.  
One of the colours in the texture map is "clear": if a ray 
strikes the square at a clear place in the texture, then it 
passes through with no attenuation.