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1.Open up the ColorCorrectionLookupEditor.cs script from Assets/Editor/ImageEffects.On line line 54, replaceif (textureImporter.textureFormat != TextureImporterFormat.AutomaticTruecolor)withif (textureImporter.textureCompression != TextureImporterCompression.Uncompressed) 2.On line line 62, replacetextureImporter.textureFormat = TextureImporterFormat.AutomaticTruecolor;withtextureImporter.textureC