The histogram is a way of visualizing the range of densities in the simulation. This can be very useful when mapping a range to a component, like mapping a color gradient to the flames channel for example.

  • The horizontal axis of the graph represents the density values.

  • The vertical axis of the graph represents the amount of voxels with this corresponding density value.

For example, if you have more voxels with a density of 0 than voxels with a density of 0.5, that corresponding white bar will be taller.

Usually the white bar at the 0 value on the left is the tallest since most simulations have empty space meaning there are voxels with no density within the bounding box. Thus the most common/frequent value is 0 making the the highest white bar.

  • You can adjust the density range to view by left mouse button clicking and dragging within the histogram.

  • You can click on the reset Icon icon to reset the histogram range back to 0-1. This will also activate the Log Y.

  • The Log Y checkbox means that when checked, the vertical axis will have a logarithmic scale. This allows for easily viewing very large and very small voxel density values at the same time.

  • The coloring remap range is visualized in the histogram by a grey overlay indicating the densities that are cropped outside the range.

  • You usually want to fit the range nicely around the present voxel densities to make optimal use of the connected color gradient. This can be done by adjusting the Coloring remap range min and max values, fitting the range around the area with the white bars. for more information in this please have a look at our Range Slider page!

  • The Coloring remap ramp parameter can be used the change the interpolation from the minimum to the maximum value of the range. Like a gamma operation. Higher values will shift the color mapping more to the left side of the color gradient and lower values will shift the color mapping more towards the right side of the gradient.