3d objects disappear and pixelated

Hello,

So i am making a Proof of concept to test out my 3d skills, as I always do 2d, but I am going to use 2d sprites instead of 3d sprites... cartoonie 3d

anyways, I am making the world... but for some reason its appear and disappeared... almost what we seen with big large areas with older games... but when you get closer, yes the sprites appear... not sure if there is anyway to improve the look of it? or it is how it is?

any thoughts/recommendations? attached is the screen shot what I am seeing and there should be mountains...

 

I'm not sure, but it sounds like you are just describing objects getting clipped by the camera frustum. Go to your Camera and try adjusting the "far" clipping plane value. A larger value will let the camera see farther.