Two Thumbnail Sketches

What I particularly like about painting on my iPad is the speed with which I can work. For making visual notes such as this one, and the one below it is ideal. For these two thumbnail sketches, which I did from memory I used the pencil and the technical pen on ArtRage. Although I like to add a little texture with the roller, or block in the colours very quickly with the paint pot, the technical pen can be applied over the whole drawing in bright transparent colours without having to go around the drawing itself. On a separate layer above the original however, it would mask what is underneath. The opacity of the colour of course, determining how translucent, or opaque the colour is.