I noticed the stack of mini planes as well, when trying out displacement with a landscape.ROUBAL wrote:
Trying to make grass using displacement, starting from a 2048x2048 contrasted noise pattern made in Photoshop, I discovered that at pixel level the displacement is made of stacks of pixels !
So many faces created explains why the displacement slows down so much the render speed !
One experiment I tried was to displace a plane with a simple airbrushed line then applied a gloss finish, no roughness. I wanted to see whether it was possible to get nice 'liquid' reflections using displacement. The outcome was the surface looked as though it had no smoothing applied, lots of poly facets. Is this user error or the way displacement works? No smoothing?