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Rescale Grid Channel – Rescales the output values of a Grid Channel to a certain range. The colors you get from the Grid Texture can be meaningful when data that is read from the Simulator is in the 0-1 range. But in case the grid data is negative, the Grid Texture will return black color, or if the data has very large values, like e.g. the Grid Speed which can go up to several hundred, the color returned by the Grid Texture will be pure white. In such cases this data should be rescaled to meaningful color values, which usually means rescaling it to the 0-1 range. You can find out more info about the Phoenix Grid Channel Ranges here.

Rescaling  Rescaling using this helper simply measures the data range of the selected Channel and changes the Color Scale and Color Offset options. If you are familiar with the Phoenix channel ranges, you can directly set the Color Scale and Color Offset to the values you desire.

If you simulate new cache files, or if you . This means that if you simulate or load a new cache sequence in the Simulator, you will need to do this rescaling again to make sure the Grid Texture values are still in the Min-Max range. Rendering Note that rendering channels such as the Fire Color and Smoke Color/Opacity cannot be rescaled. Rescaling is especially useful when you are reading channels such as Channel Speed or Channel Temperature which can range up to several hundred or a few thousand, and you want to use them as color or opacity. With such channels, so you need to scale them down between 0-1, which would require you to set a very small Color Scale multiplier - 0.001 or even smaller.

Min – Sets the minimum value you want for the Grid Texture output.
Max – Sets the maximum value you want for the Grid Texture output.
Rescale to Current Frame – Rescales the Grid Channel based on the Channel values only for the current frame. If the Channel changes its range for other timeline frames, the Grid Texture will output values outside the Min-Max range or smaller than that range.
Rescale to Entire Sequence – Rescales the channel based on the lowest and highest values of the Channel in the entire cache sequence. This will make sure that the values output by the Grid Texture will not exceed Max or go below Min for any frame of the cache sequence.

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