My procedure:
Sponge thick white paint to texture pages. Don't cover entire page with paint. When dry, ink pages to look like rock walls. Sponge inks for more color and texture. Draw animals with charcoal pencil, smudge in places. Color animals with chalks. Smudge gold glitter glue lightly onto page, scribble veins with gold metallic pen. Spray pages with fixative.