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The maps slice through the object and show the SDF at the current position. Since an object's shape can vary, the SDF maps are different at different locations. With this parameter you can browse through the object and evaluate the distance field at each position. With the use of cutting planes, the size of an object is normalized and always ranges between 0 and 1. This way it is very easy to control the current position with the “@ Offset [AxesXY|XZ|YZ]” parameters: 1.0 represents the top position, 0.5 is the node's middle, and 0.0 is the lowest point. The offset depend's on the object's "Cell size" value and the map can only follow the grid in steps of "Cell size", e.g. 0.3, although it is possible to enter any value. An example:
Imagine an object with a "Cell size" of 0.1 with an activated "Slice plane" option. To shrink the SDF and fit it to the object's borders exactly you enter a negative value, e.g.- 0.085. Now you start the simulation, but the particles still have a slight offset, and it seems as if your settings did not have the desired effect. The reason is that object is subdivided into cells of 0.1 metres and this is your step size for the "@ Offset [AxesXY|XZ|YZ]" parameters. In other words, the only working values are integer multiples of the current "Cell size": 0.2, 0.1, -0.1, or -0.2 etc. So, if you want to adjust the SDF, take a look at the current "Cell size" and work with this value to adjust the SDF. Values, different from the step/cell size, are rounded by RealFlow.
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