Join Mark Lefitz for an in-depth discussion in this video Explaining image-based lighting, part of Photorealistic Lighting with Maya and Nuke (2012).
Most commercially sold 3D render engines that use ray tracing as their primary…means to render a scene can accommodate image-based lighting, or IBL for short.…To do this, an artist must use a spherical image that captures the real world…lighting information of the scene that is being lit.…The resulting image is called a high- dynamic-range image, or HDRI for short.…The dynamic range are the values from the darkest point to the lightest point in the image.…This is also called the contrast ratio.…
To achieve this range, the image is created with multiple bracketed exposures…crunched together in a single 32-bit image.…During the post-processing of the image, it must be made into a 2:1 spherical…map, which can then be projected onto a dome or sphere.…Once this image is mapped, it will allow the ray tracer to extrapolate the…information, resulting in highly detailed, real world lighting.…This is not a photography course on creating HDRIs, but now that we know…about image-based lighting, let's see how we created that HDRI specifically…
- Understanding image-based lighting
- Analyzing and color correcting the background plate
- Creating a 3D camera to match the plate
- Lighting with low-quality settings and proxies
- Setting light samples
- Setting up render passes
- Rendering mattes ground shadow, and occlusions passes
- Adding gamma correction in Nuke
- Adding the object to the plate and rendering the final composite
- Retouching the composite using Photoshop
Skill Level Intermediate
Maya: Lighting and Rendering with mental raywith Eric Keller4h 56m Intermediate
Creating Textures and Shaders in Mayawith Eric Keller3h 30m Intermediate
1. Image-Based Lighting
Correcting the HDRI5m 22s
2. Asset Integration
4. mental ray Rendering
5. Creating Secondary Passes
6. Compositing the Rendered Passes in Nuke
7. Final Touch-Ups in Photoshop
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