How to remove Triangulation faces in Rendermode, problem with Edge split I'm making Low Poly Knight Chess figure.
I want it to look like this(No trinagles in rendered mode). 

But I get this:
I tried removing triangles with Edge split modifier, put the Split angle to 0, removed doubles, flipped normals to the right way but it stays same.

Thank you for help!
In any 3D software every face is actually made of triangles. If a face is too twisted, in Render mode you begin to see the triangles within. To avoid this artefact you can use the Auto-Smooth option, if your object is not smooth shaded (like in your case) it will kill the artefact within every face. In the case of a smooth shaded object it will also smooth the angles between faces, depending on the angle chosen.