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The CameraBackgroundColorBrush::createColorBrush method should respect the alpha component of the Color4F…

The CameraBackgroundColorBrush::createColorBrush method should respect the alpha component of the Color4F…: a task in LegoFlow-SWE (Harbor dataset). Steps to reproduce: 1. Call CameraBackgroundColorBrush::createColorBrush with a semi-transparent color, e.g. Color4F(1.0f, 0.0f, 0.0f, 0.5f) for a…

The task

**Steps to reproduce:** 1. Call `CameraBackgroundColorBrush::createColorBrush` with a semi-transparent color, e.g. `Color4F(1.0f, 0.0f, 0.0f, 0.5f)` for a 50% transparent red. 2. Render a scene containing the camera with this background brush and some visible content (e.g., a “Copyright” notice label).

Part of Lego-X/LegoFlow-SWE.