Quote - I've finished my latest image, see link. Rendered it at 1280x600 for the gallery, no problem, came out wonderful. Now I'm ready to render for print and set the size at triple, 3840x1800. Half way through the rendering I'm noticing that items are missing, my terrain is gone. All the trees, rocks, plants and water are there, but the terrain isn't. Set the size to double, 2560x1200 and the terrain is back. Set it at 2.5 times the size, 3200x1500 and the terrain is gone. The terrain has terrainscape material, with displacement.

Anyone know what causes this? Too little memory for rendering?

My guess would be that the displacement is the culprit. Try to uncheck tyhe displacement and see if the terrain reappears. You could also try to bake the displacement. If the terrain is procedural, convert it to standard and then try with and without disp.

Ciao

TD