Corel Painter X

Unique digital brushes, art materials and textures help artists achieve the perfect composition, color palette and brush stroke. Corel Painter X is ideal for professional artists, designers and photographers, it's a complete digital art studio.

Setting the standard for digital painting and illustration software, Painter X introduces new composition tools, unparalleled performance and a new RealBristle Painting System that models traditional brushes like never before — right down to the individual bristles on the brush.

• Choose from more than 30 brush categories, including Crayons, Chalk, Charcoal, Acrylics, Watercolor and the new RealBristle
• Make on-the-fly changes to brush settings and variables
• Control the texture of your canvas to achieve realistic results
• Create animated movies and save them as animated GIFs, QuickTime movies or AVI files

for more information, go to corel official site here

Watercolor tips

If you want to create texture in watercolor on large pebbles or stones try this. Draw the shape, wet the shape with a colored wash, then before it dries sharpen a watercolor pencil over the shape in the color you want (ie: grey). Leave to dry and you will find that the pencil scraping has left what look like little holes in your stones. If you scrape green or brown on to grey stones it will look like lichen.

To create a pebble area wet the area and drop drops of brown, black, grey and the tiniest bit of red paint on to the damp paper. This will spread. Leave to dry then go over it with a lead pencil and pick out the 'pebble shapes'.

Source www.how-to-draw-and-paint.com