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Questions tagged [height-field]

Questions about image-based height-field representations, commonly used to represent a terrain.

2
votes
1answer
64 views

How is this normals map supposed to work?

I have come across this image that's labelled a bump map to be used with a 3D model. It looks like this: In this map, which is an RGB map, it seems we have pixels whose normals face upwards shaded ...
7
votes
0answers
966 views

Bump mapping a ray-traced sphere

I'm attempting to apply a height map to a ray-traced sphere. The height map is stored as a texture. I have the intersection point on the sphere $p$, and I compute the normal vector at that point $N = ...
6
votes
2answers
429 views

Method for rendering heightmap from a 3D scene

I am looking for a method of rendering a heightmap from a 3D scene. The scene may consist of a terrain which is in turn generated from another heightmap, but will also have regular 3D objects. The ...
15
votes
3answers
2k views

What's the current state-of-the-art algorithm for ray-tracing height-fields?

There have been lots of papers over the years on different techniques for drawing height-field terrain in a ray-tracer. Some algorithms ray-march the grid directly (or via a quadtree); others ...