The terrain is from "Grand Mountains" with a Hyper-Texture controlled material from "Funky Shapes & Funky Metals" (both available at Daz 3D). The clouds are Bryce Stratus combined with a cloud plane from the "Sky Toolbox" (available at bryce-tutorials). No light source, brightness by reflection. Blue and white by the sky colour and red by the white clouds. An odd and funky mountainscape.