The LED blanks out now and then. I have never been able to figure out why, I think it's something to do
with closing the file and not saving.
Just remember where the .ini file is.
The sun flare is purely cosmetic. Won't affect the performance at all.
btw. All the RAS maps create the sun with the sol.py file. It's best to put the code in DefFuncs.py.
Next time you play a RAS map with the sun in it, save the game and reload and you will notice the
sun is gone.
As for performance issues, it's a question of design. The more portals (sector faces that join) the light has to pass though
the more work to calculate the shadows. There are tricks to improve performance. Steps are bad laggers. If you do a flight
of 20 steps by making sectors that go up to the 'ceiling', then you have a lot of portals for the ext light to pass though. If you
a make each step so it only goes up the hight of the bottom of the next step up and the slope each step downwards, you can
put one big sloped sector to cover them all.
Doesn't matter so much in inside rooms.
Arches in sunlight are best avoided. On the whole, avoid too many 'fiddly' bits. Textures have no affect on performance.