Light leak overlay on transparent background. A simple light leak overlay to beautify your images. Blurry gradient light for your photo filter effect. Colorful photo layer effect template 12634821 PNG
ios - GPUImage Lookup Filter - creating a color depth greater than 512² colors - Stack Overflow
Colour filters
File:Voyager - Filters - Orange.png - Wikipedia
ios - Colour correction of Photoshop LUT filter using CIFilter - Stack Overflow