Goal - In this lesson you will learn how properly set up the GI for exterior scenes in order to optimize quality and render times.
Objective - We will learn how to add Global Illumination to an exterior scene
Outcome - You will be able to add GI to your exterior scenes and know the basics of tweaking settings depending on the scene.
To set up the lesson follow the links below and download all available materials.
- With the BF + BF (accurate) Preset selected, the GI Quality slider adjusts the Brute force Subdivs used when calculating the indirect illumination
- The other GI presets can be used to change the bounce engines used in the GI calculation of the render
- The Light bounces changes the Brute force Depth amount
- The Shading Quality slider adjusts the Image Sampler’s Min Shading Rate
- Min Shading Rate controls the number of rays for AA vs. rays for other effects like glossy reflections, GI, area shadows etc.
- Especially useful with the Progressive image sampler.
- Higher values mean less time spent on AA, and more calculation time spent on the sampling of shading effects
- Threshold - determines the sensitivity of the sampler to changes in pixel intensity
- Lower values will produce better results, while higher values will be faster, but may leave some areas of similar intensity under-sampled
- Lower values also helpful when rendering textures with small details or noisy bump maps
a) Indirect Lighting
- Illumination caused by light rays bouncing off objects in the scene
- A function used to produce cleaner renders by blurring the edges of an object with pixels in the background
c) Image Sampler
- A group of settings that help set up the correct Anti-Aliasing settings for your scene
d) Ray Distance
- The distance a light ray can travel to calculate GI
Time to see it work!
Time to do it yourself!
Dialing in the right values
- GI Quality at 100%
- BF subdivs: 64
- Shading Quality at 50%
- Min Shading Rate: 32
- AA Quality at 29%
- Adaptive Min subdivs: 1
- Max subdivs: 8
- (noise) Threshold: 0.005