# Questions tagged [radiosity]

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### Directly Sampling an Area Light

So in my path tracer I sample both some bounce ray given an importance function for the current BRDF, and if applicable (reflection is non-specular) I directly sample all light sources (for my ...
• 229
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### How is Aperture and Pixel Size accounted for in calculating received power using ray tracing?

NOTE: Deleting the question to rephrase it after continuing to read other responses and toy around with it: I've written a path tracer and am now working on implementing a physically accurate way of ...
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254 views

### Albedo image map to color's Light Reflectance Value (LRV)

In many datasets in the literature of both Computer Vision and Computer Graphics there is the albedo map of a scene represented as RGB images, which in principle corresponds to the diffuse reflecting ...
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### Which technique should be used for rendering under water images, Ray tracing or Radiosity?

Rendering is the process of computing a three-dimensional geometric description of a scene into a two-dimensional image representation that looks real. Ray-tracing and Radiosity are two of the most ...
739 views

### What is the purpose of the projected solid angle $dA^\perp$ term in the definition of Radiance?

In the definition of Radiance, which according to PBRT is defined as flux per unit solid angle $d\omega$ per unit projected area $dA^\perp$ $$L_i=\frac{d\Phi}{d\omega\ dA^\perp}$$ My original ...
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1 vote
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### Radiosity normal map light baking

I'm trying to implement radiosity normal maps from the old Valve paper: Half-Life® 2 / Valve Source™ Shading.pdf | valvesoftware.com I've tried generating the light maps using Vray and 3dStudio max, ...
4k views

### How to calculate attenuation and radiance in PBR? (point and directional lights)

I would like implement physically based rendering, following this tutorial I was able to find a list of light sources ordered by lumens, but I have no idea how to use it in the calculations. ...
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### How to implement Texture Baking?

So currently I want to implement radiosity in my engine. After figuring out the amount of light that bounces between elements/disks/patches (I've been told disks are the best - correct me if I'm wrong)...
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3k views

### What is Radiosity?

After reading a wikipedia article about Global Illumination It mentions a variety of techniques like Ray Tracing, Path Tracing and Ambient Occlusion. One technique it mentions is Radiosity which I don'...
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### Problem with definition of BSDF and radiance

When I was reading theory behind physical based rendering I noticed that definition of BSDF and radiance has some problems. For example BSDF of purely specular surfaces is zero almost everywhere and ...
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### How does the view-independence of radiosity increase the calculations involved?

In the style of trichoplax' question, I want to talk about yet another Wikipedia article: Radiosity (computer graphics). The article states: Radiosity is viewpoint independent, which increases the ...
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179 views

### Are there specific techniques for generating False Radiosity in surfaces?

I thought of this after my radiosity vs ray tracing question. A radiosity algorithm seems to require increased calculations because it's viewpoint independent and therefore, false radiosity was born (...
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