This tutorial is old but everything still applies for the Nuke MARI bridge Excellent way to patch matte paintings.
tutorial
Terragen Intro Tutorial /
Excellent in depth free tutorial series by GeekAtPlay Studio exploring Terragen from a basic introduction to some more advanced concepts.
Matte Painting Techniques for Concept Design with Francesco Corvino /
Awesome new Gnomon tutorial. Matte Painting Techniques for Concept Design. Check out the trailer, looks to be a great tutorial by Francesco..
Maya Xgen Intro Tutorial /
Short intro #tutorial on the new #Xgen system for #Maya It's a very powerful Instancing system.
FumeFX Intro Tutorial /
Great intro #tutorial for the powerful fluids plugin #FumeFX for #Maya really easy to understand guide.