In 2015 TT Games maked Lego Worlds – open world game voxel-like game. It runs on 2012 year laptop without lags in 720p.
So, here the questions.
1. How they store that amount of data?
2. How they draw lego elements (in landscape, for example). Is it 3D models of bricks or procedurally generated meshes? Is a face culling there?
3. Do they use simplified mesh for LODs?
4. What a type of algorithms used for that type of placing bricks?