In this workflow, you will learn how to compute the normal map of an input terrain and export it to be able to add surface detail such as bumps, grooves, and scratches to a model that catch the light as if they are represented by real geometry.
As the vector map created by computing the normal map cannot be visualized directly in Instant Terra, an Export normal map node is used to export and view it as a tiff, png, tga, or bmp file.
We create a graph by adding the Perlin noise and Half-sphere generators, and a Disk mask. The Perlin noise is one of the generators most frequently used to create a terrain and the Half-sphere generator creates a semi-ellipsoid plot. The Disk mask creates a circular mask.
This node has no parameters.
Now we are ready to export the normal map to be able to view it as a tiff, png, tga, or bmp file in your preferred image editor.
If you have already saved your project, type just a file name to export it to the same directory or a sub-directory of your project. This is useful, for example, if you have a second project in the same directory and want to import into it the exported file from the first project. There is no need to type the file directory, just the file name or the sub-directory and file name.
|Tiff||.tif||Tagged Image File Format|
|Png||.png||Portable Network Graphics|
|Tga||.tga||Truevision Targa File|
|Bmp||.bmp||Windows or OS/2 Bitmap file|
The export is confirmed by a pop-up dialog:
The vector map created by computing the normal map
is viewed in your usual image editor. In the example below, the
normal map of the Perlin noise node and Half sphere node summed
composition is computed and exported to give the following