SketchUp Sandbox vs. Unity Terrain

I’m planning on using SketchUp’s Sandbox tool to make terrains for Unity, but I noticed that it has over 2000 poly’s for a large map. I was wondering, what is better for performance? SketchUp Sandbox or the Unity Terrain. I was thinking of possibly integrating both, by importing the Sandbox Terrain, and then using the Unity Terrain Tools to smooth it out, and make some other changes. I know this is possible, but I’m not sure which is better for performance. Since I’m working for mobile, I want to get every last bit of performance out of my games. Thanks.

try this

2000 polys would be about the same as a terrain of about 32x32 in size. I haven’t played with terrains on mobile yet, can’t say how well they perform, but if that size is about the same, probably built-in terrain would be more optimized (I would hope).