Get pixel color from TCastleImageControl

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TransformUnderMouse with Alpha pixels check for quad-based Transforms

Hi, All ! Happy new year! I want to make precise Mouse picking of quad based Transforms - like TCastleImageTransform, or TCastleScene with 2d sprite, in this case TransformUnderMouse performs hit-test over whole quad (geometry) and not taking into account transparent pixels of loaded textures. I found those similar topics : Convenient way to determine exact point under mouse - #4 by michalis and Get all geometry under raycast? - #5 by bugan11 where some ideas presented , but no complete solutio…