Photoshop is an excellent tool for manipulating photographs but it can also be used as a means to create stunning works of art.
Digital Art for Beginners is a 25-part video tutorial series that will teach you everything you need to know to start creating digital concept art and matte paintings in Photoshop.
Posts in this series

Introduction to Digital Art

The Brush Panel and Using a Tablet

Creating Custom Brushes

How to Set Up Your Photoshop Documents: Composition

Sketching the Human Form in Photoshop

Working With Colors and Establishing a Color Palette in Photoshop

How to Work With Perspective in Photoshop

Understanding Light, Shading, and Shadow in Photoshop

How to Apply Light, Shading, and Shadow to Round Objects

Create Quick Thumbnail Sketches in Photoshop

Sketch a Spaceship in Perspective With Photoshop

Create Line Art for a Medieval Robot Character Illustration

Color a Medieval Robot Character Illustration

Paint Realistic Hair Using Photoshop

How to Paint Clouds With Photoshop

How to Draw Drapery in Photoshop

Draw a Character Concept Using Drapery in Photoshop

How to Prepare for a Digital Art Project

Create a Lava Monster Concept Painting

Create a Medieval Battle Axe in Photoshop

Create a Caricature Painting in Photoshop

Paint a Castle in Photoshop - Part 1

Paint a Castle in Photoshop - Part 2