Is there a way to make a moving pixel object cause a width limited pixel turbulence to a layer below, like moving an object through dense paint or rice ?
The moving object itself should not distort, only the pixels in the layer below adjacent to the moving object's edges.
In this case, a small wavy distortion would suffice.
Could not find any similar practical solution searching...
Any idea or reference to maybe a tutorial would be appreciated!
In principle yes, but creating a displacment map for a distortion effect to do this would require toi be extremely precise and understand how the map affects the pixel motion. Using other techniques like the Shatter effect wit ha custom shatter map (one frgament per grain) may be simpler. Of course there could still be quality issues. Ultimately if it needs to be super real thatt's probably a task for a 3D simulation and rendering.
I will look into displacement map/distortion effect...
Maybe I should explain better:
Actually, I am animating a photographed painting.
The moving part should affect the underlying layer just slightly along the edge of the movement, like a very light and small disturbance /temblor/ rippling. I do not need realistic particle simulation. Still, could be that it is easier in Blender anyway
I think the simplest way to achieve this is as Mylenium says with a displacement map. I'd then create a white solid with a mask in the shape of the object, and parent it to the object, but place it beneath the painting. Add the displacement map effect, pointing at the solid with Effects & Masks selected. The benefit of this approach is that you can feather the mask or scale it up so you get more control over the displacement shape.
Adding the echo effect to the solid wouold give you a trailing wake too.
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