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What are height maps used for?
In computer graphics, a heightmap or heightfield is a raster image used mainly as Discrete Global Grid in secondary elevation modeling. Each pixel stores values, such as surface elevation data, for display in 3D computer graphics.
Is a bump map the same as a height map?
There are a couple different types of height maps that you might be familiar with already. Bump maps are the old school way of adding detail to low poly objects. They are used in the same way as normal maps, except they only contain height information and not angle information. Instead, they contain angle information.
What’s the difference between a normal and a bump map?
To answer this, let’s compare bump maps to normal maps. A bump map (sometimes know as a height map) and a normal map are different things. Technically speaking, a normal map is a sub category of a bump map. A bump map simple stores whether a pixel is displaced/extruded up or down.
What can displacement and bump maps be used for?
They can truly deform geometry up to and including edge detail, making them ideal for a much wider range of uses such as terrain creation (sometimes a displacement is called a height map for large-scale deformation) and detail modelling.
Is it good to use bump mapping on polygons?
Bump maps are great at adding a lot of low-relief detail on low-polygon objects, so a one-polygon wall could show hundreds of bricks thanks to bump mapping. It can be an issue when edge detail needs to be shown, as bump mapping does not work with side detail – it only shows the true underlying geometry.
Why do you use bump maps in Blender?
レンダリングするオブジェクトの面の法線に対する揺らぎをハイトマップ（高低マップ）で調べて、光源計算の完了前に各ピクセルに対して適用する、CGの技術である。 Simply put, by specifying a height map that has height and low information in addition to the normal texture for an object, it is possible to create pseudo shadows and highlights, and express a sense of unevenness in terms of appearance even if the mesh is not uneven.