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There is also a direct relationship between a domain's and an object's “Cell size” that finally determines whether an object is leaking or not. Another occasion where you can see fluids passing through objects is when the used geometry is very thin. In that case it is often very difficult to find a working “Cell size”. To get a better idea of how the objects is seen by the Hybrido solver, you should take a look at the “Display Volume” panel. There you will find convenient methods to visualize the body's distance fields based on the parameters of this panel. Please visit the following chapter – a comprehensive description of how these parameters work together with the Hybrido fluid: HyFLIP - Volumes and Distance Fields.
Surface offset
This parameter is comparable to an object's “Collision distance” for particle fluids. The given value acts like an invisible cache or solid extension around the object and prevents the fluid from penetrating its surface. It is often a good idea to play with “Surface offset” a little before you start to change “Cell size”. Complex objects can particularly profit from this parameter, because the buffer acts like an even wall and ignores small structures – it smoothes the surface. Another field of application is fast moving objects or fluids. In these cases, you normally have to increase the number of substeps to grant proper collision detection, but it is better to increase “Surface offset” instead, because with an increased number of substeps you also change the fluid's behaviour. "Surface offset" also accepts negative values and is measured in metres [m].
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