3d time playback performance is so much better with maxAtlasEdge=2048

[toloudis]

Use Case

When playing through some volume data, noticing that maxAtlasEdge has a huge performance impact.

Solution

I wonder if we could turn the maxAtlasEdge down by 1/2 during time playback in 3d mode and then bring it back up when user pauses play mode.

[toloudis]

using scale level bias is probably a win here. instead of changing the maxatlassize