I agree with you there! The custom depth hack just doesnt hold up on complex geometry though unfortunately.
I wish epic would let us know whether they are even considering working on it in the next year (or ever). If not, im going to look into implementing it myself, but its certainly not trivial.
this guy implemented it for his WIP tressFX build, but its specific to tressFX.
https://forums.unrealengine.com/comm…hair-rendering
Yes deep PPL would be terrible for performance, but the shortcut method used by TressFX is the more viable option.
Still not a miracle, i just really want the option for specific cases.