I have a TYPO3 4.7 environment which holds 3 websites. All theses website use TemplaVoilà template engine.
We are now redesigning one of these site and I wonder if I can use Fluid and Backend Layout instead of TemplaVoilà.
It seems that I have to desactivate TemplaVoilà in the extension manager to be able to use be layout.
Dislaimer: I'm not using TemplaVoilà myself.
The TCA Overrides of EXT:templavoila replace the backend layout fields with the respecting fields of TemplaVoilà, see here.
By reading this code, it should be possible to have both the TemplaVoilà fields and the Backend Layout fields if
in the extension configuration in the Extension Manager.