Quick zbrush tip to quickly create orthographic and perspective renders. Align the camera to front view (use shift+left click drag). Click Document>Zapplink Properties, then click the front button. Do the same for the right view. Then approximate a 3/4 view and click custom. Then simply hit "Make Character Sheet" and zbrush will punt out multiple views of your character to photoshop. It uses 2 separate layers too, so you can composite your character into a different background. You should get an image like the one below.