On 2011-01-17 03:03, Hal Lane wrote:

JoTz, Thanks for posting the link to your:

Zoom-In to FOTD 1/8/11 "Elusive Butterfly"

Very nice. Enjoyed the zoom.

What's the significance of/reason for the color map shifting and then apparently returning to its previous values as the zoom progresses?

Does the non-zero logmap value make the color map automatically adjust as the zoom progresses?

Sometimes the map shifts slowly -- other times it changes quickly or rapidly pulses. If it *is* the non-zero logmap doing it, I'm puzzled by why the color map appears to return to its previous value after a change...

- Hal Lane

######################### # hallane@??? # #########################

The logmap is set to "2". As the zoom progresses deeper, every pixel cycles thru the 256 color map, and then keeps repeating that until the zoom ends. That is why it appears to return to original colors. The map itself has regions of gradual color change as well as sudden ones - so the rate of fluctuation varies. This is used on quite a number of my zooms - in fact, it is unavoidable if the logmap is set to "2". Another nice example is the animation called "descent". Hope this answers your question.