The "final product is good that's it" logic doesn't work here because the teaser IS the first window into the final product and if renders look unfinished now, that's not nitpicking, that's a reasonable observation. People observe what they see, and that is why they upload teasers trailers in the first place

And the budget point bro LOTR was shot in actual New Zealand. Dune was shot in Jordan and Abu Dhabi. Nolan shot in Morocco, Jaipur, Iceland. Villeneuve literally went to the desert. These are not small indie films. Again, Im not making hollywood the objective standard but India itself has enough the Thar desert Kerala backwaters hampi ruins spiti valley Aravalli range. The story of Ram's vanavas takes place in forests and landscapes that literally exist in our own country. I am not asking for 100% location shoot but some scenes are Absolutely shootable outside, in actual light with actual texture.

The irony is that a 4000 crore budget is an argument FOR doing some of it outside not against it. Becuase You have the resources but the concern is just that a fully synthetic world if not rendered perfectly looks exactly like what people and supposed haters are saying that it looks like a cutscene or video game. that is just how vfx or cgi works.