Photo 2 Rhino transfer curves

You can limit how much of the image really affects the mesh by changing the transfer curve. Click on "Curves" in the main dialog and you will get a dialog which allows you, with the mouse, to drag the upper and lower limits. Here are two examples:

The brightness of the pixles in the original image are translated to mesh heights with this dialog. You can use the settings to remove "noise" in the mesh by telling it to, for example, put all dark and darkish pixels to 0% mesh height.

That is the example in the top dialog above. In that example noise in bright pixels is also removed, and all bright and brightish pixels are set to 100% mesh height. Note that if the transfer curve is very narrow, as shown below, then the mesh will have very sharp height transitions:

A related setting to the transfer curves is the image smoothing parameter.