This dialog is accessible from the Textures button on the General tab of the Terrain Setup dialog. It allows you to use your own bitmap files as hatch patterns in Terrain. For more information on hatching, see Linetypes, Symbols and Hatching.
Texture File to Load
Browse to select the bitmap file you wish to use as a hatch pattern.
Texture Destination
Select the Hatch list location to place your bitmap. Terrain supports 25 user customizable hatch patterns. They are listed as Bitmap 0 - Bitmap 24 on the Hatch dropdown combo in the Linetypes and Symbols dialog.
Copy Now
This button will copy the specified bitmap file into the selected Hatch combo position.