iphone game low framerate after adding multiplane multi texture ground object

Questions & Answers
1

in my game, when I add the object that is to display ground, the frame rate goes very slow. The frame rate is slow as the player is passing over the ground object. when the ground object ends, the frame rate rebounds.

i am building for the iphone and the framerate is slow in the editor as well as the iphone.

2

If you are using Unity built-in terrain system on iOS than I would suggest to use mesh instead cause performance is very poor. Otherwise please explain in more detail what you are using for terrain. Also watch out for expensive shaders in general when doing stuff for iOS.