Reading some of the posts here on progressive rendering (not sure what the proper term is…step refinement?) I believe this feature will benefit the artist a lot.
If you are not sure what I meant, the standalone Maxwell renderer is an example. Basically as oppose to starting at a fixed coordinates and work its way up/down, Maxwell renders a low res image first and progressivly adds the detail.
I am pretty sure Blender can implement this easily, so for example, it will render every 100th pixels (0,100; 0, 200; 0, 300; 0, 400, 100, 100; 100; 200…etc) and interpolate the rest, and then it goes back and renders say every 50 pixels: (0,50; 0, 150, etc…) Slowly, a blurry image will magically appear
Artist able to see composition/lighting/color before the rendering is finished.
You can go back weeks later to a previous render and do a semi-rerender in which pixel data will be added in for a higher res. image.
Looks cooler 8)
I realized that someone had a script for this, but I was hoping that it will be implemented in the main BF tree for the next release 2.40/1?