Game becomes very laggy when i use a terrain

Unity Engine
1

Hello,

When i’m using a terrain(size: 100x100) instead of a cube(size: 100x100) to walk on my game becomes very laggy, if i put on the stats gui i see that with a terrain the FPS is arround 500 (can fall down to 70) and without it is stable around 1000 FPS.

Can anyone say why the terrain makes unity so laggy?

PS: I did make some little hills(not higher than 10 on the Y axis) and im using a texture, no trees or the paint details.

2

The terrain system has some not insignificant resource requirements. Should not be noticeable on desktop though. Which platform are you experiencing this on?

3

Windows 7, with a 2.8GHz Quadcore, 4 GB of RAM and a ATI Radeon HD 3870.

4

Sounds like you’re doing something very wrong if you’re experiencing a significant frame rate drop by adding a terrain on that setup.