Hide the terrain to work on the sky blur
Create a test situation
Resolv problem of black point on the envmap
Add uEnvmapTex Uniform for Skybox shaders
Add a second envmap
Add the blur iteration loop in painTheSky()
Add the written envmap's attachement to the frmebuffer
Add getBluredTexel() function to skybox FS
Add multipass blur
Fix white point problem on the envmap textures
Enlarge the blur width
Re-active the terrain displaying and setup the envmap illumination
Remove noise computing when clouds or stars are hidden.
Update cameras to have a good initial position
Low the skybox and envmap resolution