Sapphire's Glare filter composites rainbow halos and/or glint-like rays at locations where the Source clip is brighter than the threshold. Lower the threshold parameter to produce glares in more areas. Use the Style menu to select different glare types. Set the Glare Res parameter to 1⁄2 for faster rendering with slightly softer glares. Use the Convolve option for smoother results. Glares are best observed on dark images with a few bright spots.