My Brown Dwarf is to be the moon to a larger, more massive Gas Giant that is not yet dense enough to create nuclear fusion. If that would even be possible, I don't really know, since I haven't done any calculations. Anyway, I wanted to research and compare other Brown Dwarfs already in Space Engine with mine. I ended up choosing the "Y8.5 V" type Star Class with a temperature of only 770K. I made sure to also set the Age as I think that affects true colors. In SE there is some cut off temperature where the cloud textures no longer display. Here's a pic of what I ended up making.
List of Brown Dwarfs I poked around looking at.
Star "S Ori 05381-02491/S Ori J053813.2-024910"
Star "S Ori 05373-02411/S Ori J053737.6-024115"
Star "ISO 138"
Star "rho Oph 4450"
Star "S Ori 70"
Star "S Ori 72"
Star "S Ori 73"
Star "S Ori 74"
19575.08 Star "2MASS 01410+18045/2MASS J01410321+1804502"
209733 Star "TWA 28/2MASS J11020983-3430355"
21672.41 Star "DENIS-P 17054-05164/DENIS-P J170548.38-051645.7/2MASS J17054834-0516462"
23070.63 Star "2MASS 08354-08192/2MASS J08354256-0819237"
Y Class Dwarfs
Class "Y V"
Star "WISE 08551-07144/WISE J085510.83-071442.5"
Class "Y0.5 V"
Star "WISEPA 15415-22502/WISEPA J154151.66-225025.2"
Star "WISEA 08250+28054/WISEA J082507.37+280548.2"
Class "Y2 V"
Star "WISEPA 18283+26503/WISEPA J182831.08+265037.8"
Here are some Nebula I was mutilating by randomizing the variables in my Models scripts -
CPU: AMD FX-8350 8 core processor 4GHz / GPU: GeForce GT 730 @ 1920x1080, 60Hz with 1GB adapter RAM / RAM: Patriot Signature 4GB 1600MHz 240-Pin DDR3 (only 2GB work, don't buy it) / Motherboard: MSI 970 Gaming MS-7693