1. Up the quality settings to production quality in the render globals.
2. Render as an iff and then click the z-depth box, you can then access it in fcheck. get the iff plugin from https://www.highend2d.com/shake/tools/?section=NT to allow you to read iff files in photoshop.
Alan
Technical Director - Framestore
Currently working on: Your Highness
IMDB