Join Mark Lefitz for an in-depth discussion in this video Rendering matte passes, part of Photorealistic Lighting with Maya and Nuke (2012).
In order to color correct, or make changes to parts of the vehicle in Nuke, we…need to single out bits and pieces of the object.…To do this, we need to assign and render individual parts of the geometry: Red,…Green, and Blue; primary colors that can easily shuffled out to white by the…Shuffle node in Nuke.…And then we can use that as a matte to do any number of different color corrections.…So, for example, if I want to darken down just the paint, let me put a Shuffle…node on the paint matte that I created.…
We're going to hit the Tab button, let's type in Shuffle, and let's set this all…to red, because that's where all my paint is.…That sets the paint to white.…Under the Grade node here, let's hit the Tab again, and let's type in Exposure,…just to darken it up a bit.…Now let's bring our mask up to our Shuffle, and we have the Exposure node in…our Properties, and now let's just view the Exposure node, and bring down just the paint.…
What it basically is doing is it's isolating bits and pieces of the car, so now we…
- 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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