To try and get an idea of what a Brown Dwarf star might possibly look like I decided that images of Jupiter in the infrared would be a good starting point. Jupiter’s interior is much warmer than it’s outer layer of clouds and this contrast shows up nicely in the images.
The highlighted glowing spot on the above image is where comet shoemaker-levey 9 collided with Jupiter.
And here are some images contrasting visible light with infrared images of the same area. By combining the details of the visible light images with the glowing of the infrared I’m hoping to achieve something believable.