Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Planets Pack #4 Free.
Planets Pack #4 v1.0
Planets pack #1 contains 8 highly detailed planets and 2 space backgrounds ready to use in unity 5.
Key features :
– All textures have a resolution of 8192 x 4096
– All texture sets are PBR ready.
– Custom shaders are provided for best results, which includes a planet shader, a cloud and an atmosphere shader.
– All textures are using a longitude-latitude UV set.
– The package contains all necessary textures, 4 shaders as well as a planet and a ring geometry.
The models have all been tested in DX9, DX11 mode (Shader models 3 and 5) and in the webplayer.
Video showcase :
A preview of all planets captured in unity can been seen here. The captured scene is using some post effects, like SE Natural Bloom & Dirty lens, which is highly recommanded.
All textures in this package has been created with Grand Designer, the procedural universe generator, available on steam. You can find more information on my website
There is a thread in the unity forums to discuss about this product : here