Power Analysis for Generalised Linear Mixed Models by Simulation.
A tutorial has been published in Methods in Ecology and Evolution.
If you get the following error, try reinstalling RLRsim.
> library(simr)
Loading required package: lme4
Loading required package: Matrix
Error : object ‘sigma’ is not exported by 'namespace:lme4'
Error: package or namespace load failed for ‘simr’