For the steak I used two very handy, new tools in ZBrush 4 – Shadowbox and Spotlight. (Fig.04). I was going to experiment with colors and textures later in Photoshop, so the steak was the only textured part inside ZBrush (Fig.05).
The image was rendered with another new ZBrush feature, Best-Preview Render, in a few different passes such Ambient Occlusion, Shadows, SSS, Specular highlights etc (Fig.06).
All the passes were composed in Photoshop.
I set the AO layer to Multiply mode and Shadow in Screen mode and then started to experiment with different color schemes by painting different colors below the composed layers (Fig.07).