GTA5: how to rescale ped model and keep it on the ground
Rescaling geometry and skeleton can make ped model hover above the ground or dive into terrain in game. The walk-around shown in this video is not the perfect solution, but seems to be the closes to the goal.
Known drawbacks: model floats on the ground during walking/running/standing animations, because of mismatch to actual animation played by the game. Also, the model does not sit properly on the ride or inside vehicle. Ideally, model movement up/down should be made via .meta files (like the model shift up/down you see while changing shoes on female ped).