The game can crash if the normal map does not exist.or it can render the object invisible. The game engine automatically determines the name of the normal map by using the name of the diffuse texture and adding "_n" to it.
To get a better understanding of what normal maps do in-game, take a look at CrazyBump's intro movie: Creating Materials with CrazyBump. Plugins for 2D image editors like Photoshop, GIMP and Paint.NET can be used to create normal maps however, a specialized tool called CrazyBump can aid in the creation of normal, specular, displacement and occlusion maps. Normals can also be created from the texture files alone. The preferred method is the use of a high resolution model that can be used to "bake" the details into the normal map of a lower-polygon model inside programs such as Blender and 3ds Max. There are many methods and tools to create normal maps. The normal map is how light reacts to the surface of a model giving it fake bumps and groves with high areas being lightly colored and low areas being darker which is controlled by the values of the color used (typically a light violet/blue color). Using the same colour on the specular as on the diffuse will result in a more saturated highlight when viewed in the game. If you need a more "neutral" highlight on a surface, your specular map should use the opposite of the diffuse map's colour. A very saturated specular map will have a very different visual effect than a grey specular map. The colour of a pixel is also used, to calculate the resulting colour of the surface. The whiter a pixel, the shinier the surface will appear in-game, meaning surfaces such as stone or old wood tend to have a very dark specular map, while surfaces like silver or plastic would tend to have lighter specular maps. Specular maps are used to define an objects shininess and highlight colour. To update the path, please read this tutorial: How to fix hard-coded texture paths in NIF files. If the texture cannot be found using the path inside the NIF, the game may crash or the object will appear pink. The name of the texture and its path is controlled inside the NIF file using the texture path. The diffuse texture is how the object is wraps around the model based on the defined UV map of the model. (Menu/2D items do not require normal maps) "color map" or just plain "texture"), specular (shininess), normal (a.k.a "bump map") and glow maps.Įach model must have two textures.a diffuse texture and a normal map. There are 4 kinds of textures, the diffuse (a.k.a.
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