SIX 4K Space Skyboxes: 6 different space scene skyboxes: with 6x 4096 textures in each.
If you have any comments or requests then feel free to give constructive feedback here. The plan is, depending on sales/interest, to expand this pack fairly regularly.
I have your purple one. It’s not very realistic, I suppose, but it looks great. 
Hi, thanks for the feedback. This paid pack isn’t approved yet on the store but hopefully will be soon.
True, the procedural nature of the nebula clouds can look a little unrealistic. I’m experimenting with some Maya fluid clouds to improve on realism.
One thing I thought was I’d just manipulate and upgrade these but then I thought it would be just as easy to leave these put and grow this pack from 6 to however many and so increase it’s size and variety over time.
So this will be a growing pack of space scene skyboxes effectively.
Now released and available on the Asset Store here: http://u3d.as/akM
The Nebula Space Scene Skybox Pack has been updated and increased from 6 to 7 unique skyboxes.
v1.1 Changes:
Updated minimum required Unity to v4.3
Added Skybox -SilverTeal
Set is now a PACK OF 10. See the asset in store for full details.
Also available individually: each skybox from this set for anyone who just needs the one: $4.50 each.
Clearly the better value is had in buying the full set!
I liked your skybox very much, can we use your asset for Global Game Jam 2017?
https://www.assetstore.unity3d.com/en/#!/content/25117
This is the link, the free version
Of course!
While I like that people are courteous enough to ask, I find it funny as my understanding of the Unity Asset Store agreement in general is: that all assets acquired legitimately via the Asset store (whether free or paid) are licenced to the acquirer for use in any interactive media/game project. (in other words That Is The Point! :))
