The integration of another rendering engine to Sweet Home 3D requires specific conditions (in french) repeated here:
- Open source
- Java library or C/C++ for JNI call
- Portability Windows / Mac OS X / Linux, or even ARM
- Ability to calculate offscreen image

As the current version of the plug-in has more useful options, future versions will only include the default rendering engine.

For those who know, they can try to create an export plug-in to external renderers.