Most unique collection of procedural brushes

OmniSketch has been on my assorted iDevices for years, and it runs just fine in iOS 10. It has quite an array of interesting effects brushes, especially if you add the geometry set.

While its useful as is, Id love to see at least an image layer added so that I could fit use pre-existing art or photos as a reference. As other reviewers have noted it would also be helpful to have better color controls.

P.mousse Esq. about OmniSketch, v1.7.4