Unity Texture atlas mipmaps 優化（seams thing、bleeding、camera angle、distance）

http://answers.unity3d.com/questions/310352/texture-mipmap-distance.html Mipmap or not

https://www.reddit.com/r/Unity3D/comments/2tyjji/issue_with_texture_in_distanceangle/ bleed corner

http://answers.unity3d.com/questions/241532/is-there-a-way-to-cap-the-max-mipmap-level-of-a-ge.html LOD distance

http://forum.unity3d.com/threads/manual-mipmapping-in-the-shader.130874/ mipmap distance shader

https://0fps.net/2013/07/09/texture-atlases-wrapping-and-mip-mapping/ Deepin