My newest digital abstractions make use of various brush textures as well as virtual texturing to make the images look like they were painted on porous stone-like surfaces. They were created using layers. On each layer there were various objects and colors which when combined made up the composite final image. I also made extensive use of blending modes. These are used to change the transparency and color relationship (blending) with the layers below. Applying blending modes made it possible to build up rich combinations of shapes and colors, something like pasting different colored pieces of thin tissue paper in layers.
All three of these compositions were created on an iPad using Procreate app and an Apple pencil. When the images were finished I used iColorama app to add surface textures to complete the process.
Select any of the thumbnail images below to see composition at full size.