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Too many indices for index buffer

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The following error message may appear when the game crashes if a lot of geometry is in the current PVS.

Engine Error too many indices for index buffer. . tell a programmer (##### > 32768)

This means that too many vertices are being drawn at a single point in time. No more than 32768 vertices can be drawn at a given point in time, due to the size of the index buffer.

Clarify: Indices aren't directly equivalent to vertices; HLMV HLMV can display how many of both are on a given model.
Confirm.pngConfirm: Do the 64-bit versions of Team Fortress 2 Garry's Mod Strata Source increase this limit?