Learn how to control light intensity decay over distance.
- [Instructor] Arnold obeys physical laws…but also allows the bending or breaking of those laws.…One of the laws of physics that affects lighting…is the inverse square law.…It states that a radiant energy source…will diminish in intensity…according to the inverse square of the distance.…In Maya terms, this is known as a quadratic decay.…If you want physically accurate lighting,…then you want quadratic decay.…However, there are many situations in which we need…to art direct the light and bend or break the rules.…
We can still control the decay rate,…or lack thereof, using Maya lights,…and Arnold will render those just fine.…If you're using an Arnold native light,…and you want to control the decay rate,…then you'll want to add a filter.…Let's create an Arnold area light.…Go into the menus and choose Arnold,…Lights, Area Light.…We want to scale it up,…but we're currently seeing its shape node attributes.…Let's open up the Outliner,…select the object in the Outliner: aiAreaLight1…and set its Scale X, Y, and Z to five.…
AuthorAaron F. Ross
- Arnold rendering concepts
- Lighting with Maya and Arnold lights
- Controlling exposure
- Filtering light with Barndoor and Gobo
- Light attenuation with decay
- Image-based lighting with SkyDome
- Exterior daylight with Physical Sky
- Arnold standard material attributes
- Mapping material attributes
- Rendering refractions
- Mesh subdivision and displacement at render time
- Shading effects such as ambient occlusion and vertex color
- Camera effects such as fisheye and depth of field
- Animation image sequence rendering
Skill Level Intermediate
Rendering refraction4m 56s
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