Retopo and baking issues

Cube Republic

Hi there. I would like some advice on retopology, UV mapping and baking normal maps. I'm trying to bake from the high poly columns that were made in zbrush. I then retopologize in topogun. The resulting mesh is exported into blender where I UV map it and then re-import back into topogun for baking, or I occasionally use xnormal. I get awful marks on the normal map especially where the columns meet or where there's a gap at the top. Also I get seams all along the edges of the UV islands. How can I avoid this?

Zelfit

I don't see problems from this angle. As for seams, try making all uv borders hard.

Cube Republic

Thanks zelfit, I watched a baking tutorial last night. I should be using a cage so the rays are not at right angles around the edges