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Cool! Looking better already. I don't think there's anything wrong with bouncing back and forth between core gameplay coding and polish. As long as you are OK with your game idea, you know it's fun, and are committed to completing the game at this point, all that stuff has to be done anyway, so it's whatever order feels most natural. For my Ludum Dare game Vertico the very first thing I did was make all the music and ambiance before any coding, to set the mood.

If I were doing the camera, I'd try setting up specific cameras for each level and place them what I feel is the most cinematic view that also lets the player see what they need to. I would tie this camera to specific hexes so when they move to a different area, the camera switches. If you'd like, you can still allow the player to manually break from this control, or have not-as-important areas where camera control happens algorithmically. This was used to great effect in Twinsen's Odyssey:







Since you have tank movement this sudden cut wouldn't disrupt player controls at all, but if you prefer you could just have your camera lerp from one position to the next. This technique is definitely underutilized in third-person games --- either it just doesn't occur to people or they don't want to do the work.

Also the hard-shaded water is a neat effect, but you could probably improve its motion by applying a perlin noise function to the y positions of its vertices.