Revision as of 18:02, 20 September 2013

Category Environment Lighting

Topics about lighting in games.

Physically Based Rendering

• Physically based rendering in games Polycount forum thread
• UDK Physically Based Lighting! Polycount forum thread
• TGA Physically Based Lighting CGFX Shader for Maya Viewport Polycount forum thread
• Ready at Dawn's Material system Polycount forum thread
• Game environments – Part A: rendering Remember Me on fxguide.com
• Physically Based Rendering for Artists by Andrew Maximov
• Albedo is pure colour, no lighting information baked in like we do currently with diffuse maps.
• Roughness is calculated in a specifically measured way and requires a 0-1 input only. Gloss can interpolate that input to a greater range where Roughness "shouldn't".
• Reflectance is again, a measured value for a material. there are plenty of sources online which you can get the measured reflective colours for various materials. typically speaking, most non-metals fall into a white 0.04 range, while metals (having no albedo and being pure reflection) have much higher, coloured reflectance. Specular is something that, along with gloss, artists have to fudge to get a pleasing look.
• Overall, PBR is more about measured results rather than mixing in 3 different maps in different proportions to achieve a look.

Lighting Links

• AmbientOcclusionVertexColor
• Model Presentation#Lighting
• SmoothingGroups
• VertexNormal

Lighting Tutorials

• UDN Volumetric Light Beam Tutorial
• The Hows and Whys of Level Design - Lighting (excerpt) - by Sjoerd 'hourences' De Jong

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