Questions tagged [occlusion]

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2
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1answer
53 views

A solution to sprite visibility in a raycasting engine with variable wall heights?

I am writing a raycasting engine. At this point, I have added sprites, and I am using a z-buffer, with one stored length to a wall for the x coordinate of each ray. Below is an image of a sprite which ...
1
vote
2answers
103 views

Techniques for rendering high polycount models

I would like to know what common techniques are used for rendering large models, when using rasterisation within a graphics API, for example OpenGL or Vulkan. For example if I had a model with >10 ...
3
votes
1answer
384 views

How to deal with light leaks?

I'm struggling with light leaking through meshes (especially thin ones) due to interpolation between probes located on the opposite sides of those. First approach I took was mapping all static ...
9
votes
1answer
224 views

Sphere intersection occlusion (for hybrid raytracing)

Thinking about hybrid raytracing, hence the following question: Suppose I have two solid spheres $s_1$ and $s_2$. We know their centres and radii, and we know that they have some overlapping volume ...
10
votes
2answers
479 views

With modern fillrates and deferred rendering, is occlussion culling still relevant?

For example, while it's the current top-of-the-line GPU, the GTX 980 has a staggering 72.1 gigapixels/second fillrate, which with back-to-front rendering and/or Z buffer checks, seems almost ...
4
votes
1answer
203 views

How can I get a spherical visibility mask map for a point on a concave surface?

I encountered this problem doing my project. Suppose there is a 3D mesh model, e.g. a human face, I need the 3D visibility map at each of the vertices of this model. By the "3D visibility map", I mean ...
7
votes
1answer
3k views

What is occlusion?

Occlusion "is the effect of one object in a 3-D space blocking another object from view." With this definiton in mind I cannot understand sentences like: The interior of a tube is typically more ...