I want to use a color adjust (or lineair step) to get what I want as a scale filter for the fractal warp, but I get these strange dots when objects (bushes) are present. Seems like miscalculated shadows/lights, because soft shadow has influence, and force all edges doesn't do anything with them. Compute terrain (even small patch) isn't helping either.
Then I thought to use a smooth step scalar with the same values as the color adjust. They look (preview) almost similar, but the effect on the scale filter is striking and not what I want. But the artifacts are gone!
So this is a dilemma and a question about the nature of these two: lineair step and smooth step. What can cause the miscalculation of shadows/lights?