RKM - Filtering

The “Tension” parameter of this section affects the mesh's borders, and can be used to make them thinner and sharper; “Relax” is used to smooth the mesh, and “Thinning” is applied to the entire mesh. Please be careful with these parameters, because high settings change the fluid's characteristics: over-filtered meshes often look like liquid metal. Another effect you will observe is that filtering removes details and the mesh shrinks.

Filter Mesh

This checkbox is used to switch the filters on or off globally for the particle sequence (s) which is (are) currently active (s) - for example if you want to evaluate the influence of the used filters.

Relax

This filter type is the right choice when you want to smooth mesh; it also creates sharper borders. A value of 0.1 is a good starting point. Instead of playing with “Relax”, it is often better to adjust “Samples”.

Tension

“Tension” is used to flatten or remove unwanted ripples or high-frequency patterns. A starting value of 0.1 - 0.2 will be sufficient for most applications. It is better to keep this value fixed, and increase “Steps” instead.

Thinning

This filter affects the entire mesh, not just particular areas. The effect is that the mesh becomes thinner. “Thinning” is very fast and gives nice but sensitive results. Valid values range between 0 (no thinning) to 1 (maximum). We recommend low settings between 0.1 and 0.3. Please also note that “Thinning” is not affected by “Steps”.

Steps

Only “Relax” and “Tension” are influenced by this parameter: it tells the mesh engine how often these filters will be applied. High-resolution simulations require fewer samples, and the more particles a scene contains, the fewer steps are normally needed. Start with a moderate value, and increase it slowly, if necessary.