[Request] HUD layer scaling

[Saedriss]

For the moment the HUD is rendered on a separate layer, and we have little to no control over it.

It would be nice to be able, to either scale this layer up or to have the ability to move it closer to the viewpoint. There are very nice mods that change the HUD to look like the inside of an helmet. But it looks very silly when it only takes a third of your view.