Some backgrounds I made for a swap. I used watercolour paper for this background. The pattern is made from a thin plastic stencil I have. I first sponged gesso through the stencil over most of the paper. After it had dried I sprayed the sheets with three colours of Radiant Rain which has a bit of a shimmer as well as colour. When that was dry I sponged a dark blue acrylic paint through the stencil and left to dry again. Finally I mixed some of the blue paint with some black lava texture gel and used a palette knife to apply it over some of the blue paint. This all gives a layered effect and some texture too.