When commander places a building currently only the smoke tells players if it built or not. Therefore I was thinking about this simple building effect: Unbuild structures are 75% transparent. When you build them the transparency will be reduced constantly till 0%. If possible also add some cheap electrical particles to unbuilt building. Pro: - Adds some more eyecandy - New building don't appear suddenly from nowhere. They fade in. Con: - It will be more easy to find the building engineer The same effect could also be used when you build or redesign a tank. But there the change from 75% transparent to 0% transparent should only take about 1 second.