There is, it’s called “cornicopa3d” (http://www.cornucopia3d.com ) and is a subsidiary of e-on software, so pretty much everything on that site is geared towards Vue
102 atmospheres available: http://www.cornucopia3d.com/store.php?first=1&sel_dir=Atmospheres&level=0&sel_type=Atmospheres
As for the “grain”, is a more in-depth thing to answer (and a variable problem)…
Grain (noise) is caused by quite a few different things, and rendering skies made in Vue without noise is a time consuming process, not so much in the creation time, but in the rendering time. The hard and fast rule is, the better your computer is, the faster you can render better quality skies. Vue is a RAM hog, and will eat as much RAM as she can get… CPU power is also a major aspect of rendering speed, and, if you are lucky enough to have an expensive GPU or 3, you can get a lot more out of rendering if you utilise tech like OpenGL/CL etc.
Keep an eye out on my wiki profile for more Vue related stuff, as I plan on writing a guide in the near future that will be for rendering skyboxes and skydomes with as little hassle as possible.
Skyboxes are a little more advanced, and creating 6 seamless inner faces to a box isn’t as easy as the end result makes it look. There are several tricks to employ to create the perfect skybox, but for skydomes it’s not as difficult and generally the setup time isn’t even worth mentioning (can be done almost completely in Render options instead of using some in-scene camera trickery to create a skybox lol)
Hope this helps
That was exactly what I was looking for thank you very much! How do you enable OpenCL on Vue xStream? I have a GTX 970 I assume it would perform than my i5 4590.