The main fix: performance has been improved.
Aesthetics:
- New selection effects: rings for mines and the main base, and rune circles for units.
- An animated construction grid and updated placement markers, with visual feedback for valid and invalid positions.
- Reworked territory visuals with smooth outlines, animated shading and flowing highlights.
- Refreshed lighting, sky, terrain, trees, glass and particle effects.
- Fixed mine panels and unit upgrade/sell controls appearing behind selection effects.