I'm trying to render a large scale image (20.14k x 12k pixels) for a display.
Visualize builds the render from a series of tiles, as you'll have seen if you ever watch it rendering a final image, rather than just letting it run in the background. The threshold at which Visualize starts tiling the image is 2^24 pixels---(2^24) does tile, (2^24)-1 doesn't. I don't know whether this is a function of Visualize, or system-specific. If anyone feels inclined to test this:
4096 x 4096 = 2^24
4095 x 4097 = (2^24)-1
For the image I'm creating, this threshold results in a 10 x 6 array of tiles. In the darker areas of my image, the boundaries of these tiles are clearly visible when the image is inspected. I wonder whether a forensic analysis of the image would show that the problem extends into the paler areas, too. I cannot share the image, but have attached a crop which shows the problem clearly. I assume that Visualize renders each tile without reference to adjacent edges.
Does anyone know of a way to prevent this, or minimize it? I don't really want to have to post-process this in Gimp, or whatever, not least because I don't have time to learn the software right now.
Renderer Selection: Accurate
Render Mode: Quality
Render Passes: 1000
Render Device: Hybrid
Graphics: Quadro P4200
I plan to contact my VAR tomorrow (it's Sunday afternoon here), but I'm hoping someone here can help today.