your modified Titan looks admittedly nice. Yet the scientific results clearly showed that its clouds are essentially NOT transparent to visual light. They are becoming transparent, when infrared filters are used. For Celestia the rendering is based throughout on visible light, hence there Titan's clouds should remain an untransparent orange. In celestia.Sci, I pursue a much wider approach implementing multi-wavelength astronomical data. Here one might interpret your views as infrared filtered.
Perhaps near the poles there is less smog. See this thread about my respective work by implementing a specular map
for this huge Titan lake, called Kraken Mare
. Here a specular reflection has indeed be seen.
Here is a view that shows the specularity from Kraken Mare near the pole:
Or here Lake Ontario near the pole:
Which surface textures did you use? Perhaps you know that I did the official one in the Celestia distribution, as well as various later ones (also discussed here in the forum). My Titan textures were circulated both at ESA and in the Planetary society.
After we have now learned that there are indeed lakes on Titan, a specular map might seem reasonable. Yet mostly, there is no direct sun light reaching the surface. Hence there is practically no specularity in reality since the small amount of diffuse light reaching the surface is practically undirected...
How does the backscattering of sunlight look after your modifications of Titan's atmosphere?? Here we do have very precise data. This is a VERY critical test.