Hi,

I designed a model to 3D print. But unlike the side surfaces, top and bottom surfaces are not coming smoothly, and i am seeing a diagonal alignment of the layers at top and bottom. But in the design, I made all the surfaces as plane surfaces. I tried to print in fine resolution and with 100% fill, still, the surfaces are same.  I am totally confused and don't know how to correct it. Please help me.

Check the red one which is so well and stable while the blue one is not similar and has layers. I want the complete model as like red