docs: document CameraFrame Color LUT setup and texture requirements#964
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Adds a Color LUT subsection to the HDR Rendering guide covering how to load and use CameraFrame.colorLUT with the texture-format contract introduced in playcanvas/engine#8747 (sRGB on, mipmaps off, linear filtering). Includes the Unreal-format layout description, required texture settings with rationale, a full asset-loading + assignment code snippet, the authoring workflow, and embedded neutral and cherry example LUTs as visual references. The CameraFrame index page LUT bullet links to the new section. Japanese mirror updated to match.
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Adds a new "Color LUT" subsection to the HDR Rendering guide covering how to load and use
CameraFrame.colorLUT. Companion to the engine fix in playcanvas/engine#8747 which introduces a contract on the LUT texture (it must be loaded as sRGB, no mipmaps, linear filtering).Changes:
### Color LUTsubsection indocs/user-manual/graphics/linear-workflow/hdr-rendering.mdcovering:srgb: true,mipmaps: false, linear filtering) with one-line rationale for each.docs/user-manual/graphics/posteffects/cameraframe/index.mdLUT bullet now links to the new section.static/img/user-manual/graphics/linear-workflow/lut-neutral.pngandlut-cherry.png.i18n/ja/...).Companion engine PR: playcanvas/engine#8747