I took a look at that web page, and it *is* difficult to figure out how the
color blending (for depth cues) should be done.

But here's a 'thought experiment':

Let's say that on a clear day (in the real world), the distant horizon is twenty
miles away (just a guess.) Between 19 1/2 and 20 miles out, there is almost *no*
3D effect that we can discern; whereas, from your eyes to 1/2 mile out, there
is much more of a 3D effect. (In fact, the '3D appearance' of objects in a scene
becomes much more pronounced, the closer those objects are to our eyes.)

Translating that into color blending (using two random colors): If pure GREEN is
located at your eye position, and pure BLUE is 20 miles out, it would seem that
the 'middle blend' of the two colors should *not* be at the 10-mile mark, but
should be much closer to your eye position-- maybe at the 3-mile mark(?)  So, it
seems that the color blend should not be linear, but exponential in some way.

Post a reply to this message