The Texture Nodes group includes all procedural texture nodes and Render texture nodes.
The Texture Nodes module adds a submenu to the Main Menu with the Texture Preview window.
There are 3 types of nodes in the Texture group:
These are nodes that define a procedural texture. A procedural texture is computer generated image created using an algorithm.
These are nodes that modify the input textures, either by changing the color or the rendered area.
These are nodes that render the texture in the input node as an Image.
In this node graph, the Perlin Texture node is a Texture Generator node. The Texture Turbulence node is a Texture Modifier that modifies the texture sampling points. The Render Texture node renders the input texture as an image.
Main Menu > Texture > Texture Preview
The Texture Preview window displays the texture in the Active or Display node.
See Texture Preview.