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Chapter 7: Image-Based Lighting

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In the eighties, the term computer-generated imagery (CGI) was introduced. CGI is a way to create believable pictures of virtual objects, images of things that don’t really exist in the material world. These virtual things consist solely of geometric descriptions, which are designed in a 3D application or scanned in. Render algorithms form the virtual counterpart of a camera and allow taking a snapshot of this data.

Calling it “computer-generated” is a bit misleading because there is still a human who models the ...

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