Waterfall_13
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Let me chime in as a passerby.
Why 30k polygons for a simple tower that the player sees from a distance on the global map? The same information, without losing "quality," can be conveyed with 1k-3k polygons.
The model that is prepared for the game has 3.4k tris. And 30k is a high-poly model for texturing, which will not be loaded into the game.