select the outer border one edge at a time, align the verts until it's straight. then select and relax the inner verts or, use relax using ignore outer border.
1. Hm as for UV. That also happened to me. I uv the mesh in rizom-uv to check it out. Whenever I imported the mesh the UV was broken but when I re-imported the mesh the UV was as good as it was in rizom-uv. I don't know what the problem is. 2. About using less support loops. I wanted to have smooth areas in those areas,…
I created a night scene with ray tracing last night and saved the file closed it reopended it and the scene isnt lit anymore with the dark sky, is there an option i need to select to turn it back on?