You might have seen that LuxRender 1.4RC1 (Release Candidate 1) is out and you might wonder if you should give it a try.
First, it’s important to understand that you can keep as many versions of LuxRender installed on you computer as you want. It makes no difference if you have one version of LuxRender or fifteen. Reality will only use the version that is configured for its use. If you have Reality 2.5 for Studio you find the path to LuxRender in the Output tab. If you use Reality 3.1 for Poser then you find the path the LuxRender in the Render tab.
So, whenever you try a new version of Lux, do not replace what you have. Instead install it in a separate folder.
LuxRender 1.4 does not bring anything new for you. This version is a complete rewrite of the LuxRender engine, what is called LuxCore. This new core has many advantages but they are not visible or usable at this stage. Also, this version is likely to have many bugs and not work as expected. The fact that it’s called RC1 means that this is beta software. If you are not comfortable living on the bleeding edge of software development you should save your time and avoid installing LuxRender 1.4RC1.
If you do install it and use it please note that there is no support for it in Reality 2.5 or 3.1. None whatsoever. If you find problems in using Reality with LuxRender 1.4RC1 please do not contact me.
Support for LuxRender 1.4 or 2.0, as the final version might be probably called, will be added at the right time, once the new version of Lux becomes stable and reliable. For now you need to use either version 1.2 or 1.3. They are both available here, in the LuxRender download page.