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If you can see collision problems which cannot be solved with “Surface offset”, “Domain offset”, or smaller cell sizes then you might want to use this method instead of “Face area”. Supersampling is very accurate, but also computationally intense and adds some artificial friction to the fluid. With curved surfaces, “Supersampling” should not be used, because you might see and an unwanted alias effect in areas where the fluid touches the object's surface. It is, however, a good choice if collision objects show many sharp angles.
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