Light

Using light to create shadowing

First, I coloured the cube 3 different shades of gray to give the shape a 3D look without shading.  I then used the polygonal Lasso tool to create a shadow for the object from where the light is coming from.  To give the light a fading affect, I used the gradient tool on the left face to make the face look like it loses the light source.

I found the process easy as I used basic tools to create this affect.