Unreal Engine Virtual Reality Quick Start Guide

Material techniques

As mentioned previously, materials for VR should be planned and designed to minimize the number of draw calls that are required in every frame. Each mesh should incorporate the minimum number of materials to reduce these draw calls. In the showdown demo, Epic Games created many purpose-built props, though some were taken from previous demos, such as the Samaritan demo. The meshes constructed for VR all follow a similar pattern. All are optimized with low triangle counts, and most utilize only one material.

The translucency/transparency is kept to a minimum and only used in a handful of locations, such as the glass in vehicles. The glass in the surrounding buildings has been faked through the texture images that are used. ...