How to minimize modular pieces for an elliptical colosseum?

explodingSeed

Hey guys, I am trying to build a modular kit to make up the entire colosseum. I am stuck on how I can minimize the pieces since the colosseum is of an elliptical shape. Wouldn't there be a ton of modular pieces because of the curvature change? Does anyone know how they build it in Assassin's Creed or Ryse?  It's to be put into Unreal 4 as an actual environment so optimization is necessary. Any help would be apprecaited.

Alex_J

an ellipse can be mirrored across two axis, right? So essentially you can build one corner of it only, I'd think.

musashidan

You can build a single modular piece and use UE4s spline path.

Eric Chadwick

The front of each arch can be flat. Then rotate them slightly and interpenetrate the sides. Each arch can have one side column, which its neighbor arch will interpenetrate. That way you only need one vertical set, smaller archways for each higher tier. You can add variant arches for variety, but at the minimum you only need one.

explodingSeed

Thanks guys for all your help!! I think I am going with Eric’s approach. I also read it somewhere that the use of round column was to hide the fact that each flat arch doorway intersect another in a slight angle. So without the column you would see these intersections.