Does it show correctly in reflections?
Imho “correctly” is the right word. Yes you can, for sure, but is that reasonable ? If you have to render delicate and well crafted reflexions, be sure camera projection is not the most appropriate technique. This technique, as every others, is not a panacée. It is good for some projects, not for other ones.
Camera projection was used and over used by professional in the purpose to obtain acceptable results at lowest costs for movies and games, and though it’s replaced today by more sharp techniques (parallaxe objects modelling, vertex texture tesselation, etc…) it returns great results in several cases with few ressources consuming in terms of composition and rendering.
For DAZ Studio users, Camera projections must be perfect for grounds, rocks, hills, trees, walls and street views, and some specific objects. Absolutely not for Victoria.
Imagine you want to build a glorious Spartacus scene, on an old decayed Via Romana looking pavement road. How many millions of polys you have to modelise, How many hours to render them? Just forget it.
You make instead a quick spline object in Carrara, and then “project” on it a Via Appia touristic photo, pre-worked (if I can say) under toshop, and within half an hour you get an “acceptable” 2.5D result, saving a lot of time to spend on your mostly important Freak5 gladiator’s pose and realism.
Just remember DAZ’s early days “Millenium Environment” celebrity.
And, to come back to reflexions, let’s not forget there is somehow a brotherhood with Camera Projection. In some rare situations I remember having used relexions on primitives to resolve some tiling and mapping problemes, of back-camera landscapes and objects.
That being said, I can’t wait to download next friday DT’s shader for testing this week-end, in the hope he will not invent yet another shader next week, lol.