17.13 The Render Filters
The Render menu contains three submenus and seven normal entries. All the filters in the Render menu replace the current layer or selection with a pattern, and they are generally used on an empty image or an empty layer.
The Clouds submenu contains four filters for generating cloud-like effects, but the first filter is almost exactly the same as the fourth one. We omit Fog, which does not seem very useful.
Difference Clouds first generates Solid Noise, which will be discussed below. This filter acts on a new layer, then puts this new layer in Difference mode and merges it with the original layer. We used this filter on the image shown in Figure 17-222 and got the result shown in Figure 17-223 ...