Using Cel Shader to Cast Shadows on 100% Luminant Objects

In this tutorial I’m going to show you how you can use Cinema 4D’s Cel Shader to allow for shadows to be cast onto objects with 100% luminance.  I covered the Cel Shader in a previous tutorial but had a lot of people ask me about how this specific task is done so I wanted to go a little more in depth and highlight just the Shadow function in the Cel Shader.

To learn how I recreated this line art style of illustration in Cinema 4D,check out my Creating Line Art Animations Using Sketch and Toon tutorial.

19 Comments

  1. Thank you for this insight tutorial, I learned so much about Sketch and Toon shader for my new project, and below is what I came up. However I have a question that when I applied an image texture (cup noodle label) on the luminance channel, the image overrides the single color shader, and shadow doesn’t cast on the label. Is there a way to have layer shader within the luminance channel? My current solution is to render 2 different versions (one with mapping and one with shadow) and then composite in After Effects…
    https://www.behance.net/gallery/66308685/How-oodles-of-Cup-Noodles-took-over-the-World

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  2. Jovan Mijuskovic

    Hi EJ, thank you for your tutorials, appreciate what you do.

    Currently, I’m doing an airport scene, airplanes in the back, people are moving through the walkway, plants, benches, signs…and I have two options to get that shadow, either to do a shadow pass with color material after I render luminance material scene and composite all together in AE or to use your method. I would like to hear what would be your approach to get the same shadows in a bigger, way more complex scene?

    Thanks in advance and keep up the great work. All the best.

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