...
When you import an object from an external source, and take a look at “Collision distance” then you will always see a default value. In some cases, this value is very small or very big. With very small values you will get a better representation of the object's surface, but simulation times will increase as well. With large values, the simulation performs faster, but you will see the aforementioned gap.
Collision distance set to 0.3 and 0.01
If you are not satisfied with the given default you do not have to guess, but use a simple formula instead. Look for the node's largest side under Nodes > Scale. Then, take this value and insert it to this term:
...
| Info |
|---|
| Please bear in mind that these tips are only valid for standard particle fluids (“SPH fluids”), not RealFlow's Hybrido fluid system. Hybrido uses a completely different approach. Please follow this link to read more about how to improve Hybrido's fluid-object interaction. |
...
Imagine the following simulation where you fill a container with a fluid. After a few frames you zoom in to the border between the object and the fluid. Here is what you will most probably see:
[ Image: container + fluid → particle layer ]
A layered look like this is often the result of an insufficient resolution, but even with very large amounts of particles it cannot be completely suppressed, because it is a technical limitation with SPH fluids. The good news is that these layers do not influence the fluid's mesh: as long as this effect is not very pronounced it can be neglected and you will not see any gaps or holes in your final meshes. Another positive side effect is that these layers help to relax the fluid much faster – the fluid comes to rest earlier.
...
For more information about this daemon and its options, please visit its documentation page.
Python-scripted tendrils without (left) and with (right) RealFlow's "Sheeter" daemon.
...