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xx we need to discuss tiling, including ST-Tiling, Clamp, and all the different tiling modes.
xx On the topic of clamping and tiling, it's worth mentioning that texture coordinates can be manipulated—they can be translated and scaled. This allows for control over tiling techniques within the shader. This is an important aspect that we should definitely include, possibly with references to the methods developed by Pixar for prman in 90/2000s.