Reference Manual
This area is responsible for management of materials in Vanda Engine 1 and lets you assign Normal Map, Gloss Map, Dirt Map, Diffuse Map, Bias and Scale factors to the selected geometry or skin.
To access the Material Editor, you should follow these steps:
1. Select your desired instanced geometry or skin.
2. Click the  Button. Alternatively, you can go to the Modify | Geometry | Material... menu.
Material Editor is relative to skins and instanced geometries. So if you don't select the skin or instanced geometry, you can't access this editor.
Although selection is based on instances of geometries, textures are assigned to geometries (not to instanced geometries). Vanda Engine assumes that texture data relates to the geometry of currently selected instance or skin and is shared among all of the instances of that geometry.