MFS and X-Plane already model this important feature.
It is surely a weather modelling feature which is required for Level-D sims in order to allow for training cold or hot weather operations / precision approaches.
In P3Dv6 the pressure lapse rate is still standard / ISA, so the effect of cold or hot temperatures on the pressure levels ( geopotential ) can't be modelled even using 3pd weather injectors.
Simulation of non-ISA pressure lapse rate
Simulation of non-ISA pressure lapse rate
Flight Simulation is the virtual materialization of a Dream...
Re: Simulation of non-ISA pressure lapse rate
This needs simulated