I am trying to make a simple liquid simulation of a liquid going down a carved path on the ground.
I can't seem to make the liquid flow along the obstacle, all or part of it always seem to hover above the obstacle or have a gap / margin between the obstacle and the fluid. It produces shadows and artifacts that are neither realistic nor aesthetic, which I would like to iron out.
This is what I tried:
Obstacle Material: the obstacle had a rather complex material with bump maps, which I thought could be the cause for these gaps, so I changed the material. Still nothing.
Subsurface on the obstacle: the obstacle also had a subsurface (not really sure whether or not this should be taken into account when creating fluid simulations), so I applied the Subsurf to the obstacle and re-baked. Problem is still here.
Increasing resolution: This is where I get a bit confused. I can get good results with low resolution (50) and quick playback: the liquid adheres to the obstacle rather well. When I increase the resolution to create a final export, the result is very different and the gaps are back.
I have also:
-applied scale to all the objects in the scene,
-fitted the domain to the elements as best as I could,
-made the obstacle a shell,
-tried alternatively Honey / Oil / Water settings,
-tried to change Slip settings to Free Slip / No Slip / Partial Slip for obstacle or domain,
-solidified the obstacle,
but nothing really fixed this problem. I want the liquid to fill the shape I designed like a normal, real liquid.