How to disable double rendering for double sided, transparent objects?

[Mugen87]

Note that with r148 the behavior has changed, see:

Build (130 - 131) Performance dropped by 50% due to new texture processing with DOUBLESIDE material

With r148 we have reverted THREE.DoubleSide to the original behavior. So the workaround suggested in this topic is not necessary anymore. Devs who still need the better render quality when rendering double-sided, transparent objects can now assign the new constant THREE.TwoPassDoubleSide to the side property of Material.