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

[ingun37]

I recently updated ThreeJS from r121 → r139 and noticed the FPS’s dropped by half. The reason was this update from r130.

WebGLRenderer: Render transparent doublesided in two calls

I read the thread and it was understandably controversial. I could see many people wanting to turn it off due to the performance issues. Yet AFAIK there seems no actions had been taken to address this issue.

Has there been any updates regarding this issue? Is there any other way to disable this feature than modifying the original code?

[MixTeR]

You have to disable from the core. See this thread

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

[ - YouTube] Good evening, I decided today to do a performance test between build versions 129 and 131. At the stage of loading the scene, it slows down because the recording is in progress and the browser without a cache, all data is loaded from scratch. I have uploaded one of the locations this is a forest for 50 mobs. In my engine, it is provided that all objects that do not enter the camera are automatically removed from the scene, and when the camera is directed at them, they …

Here Mugen and Kiborg post a workaround.

Note: I also disagree with the scene’s decision to aim for quality at the expense of performance. In my case, version 129 is still the best in terms of quality and performance.

[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.