No you never can adjust the lightning.
Image based lighnting, as cerebus pointed out, is a very recent feauture and I'm not even sure, if it's avaiable in recent games like crysis.
@ chieftain just as you wan't soem suggestions:
the top texture has to much shadow information and tiles bad. Thats the problem with textures: they look nice in photoshop, but when you see them tiled in game it might turn out quite different. I stilll make this mistake alot (especially with this texture) so don't worry about it.
Personally I wouldn't use the 'wood 4' texture for wood appliances. They are extremely well done and they are alright this was. But I always got better results with 'wood5' (Which is used almost everywhere in the game)
Again a decission of personal chioce: sometime when you combine two texture sources (e.g. the transition of stone to sand) , it looks unrealistic.
I would either blend them into each other, or when I use a shadow (which is sometimes to dark in your textures) I would try to add I would try to add a little bevel & emboss (just very little) on the top layer, which makes it stick out more.
Basically always ask yourself: Is this material ontop of the other or is there a transition from one material to the other, when you coose which way to go.
The rusty door is a great texture but the bad thing its flipped horizontally in game which creates sort of a pattern that makes it hard to recognitze the texture in game. I hate flipped textures because they are hard to screw up. Make sure the area where the flipping happend it completely clean so this pattern will not show up.
Last thing: The wood planks right when you enter the dungeon have to much burn on them. the look red in the middle. Again thats a problem with this base texture you used. You could try to desaturate it before you color edit it.
And now for some things I really liked!
The textures I didn't mention are well done and fit perfect into the cave
The wood works on the walls are nicely done especially tith the ropes around them.
The texture you used for the walls turns out nice (thats also one I would have been cautios of using but in this case it worked very well)
I especially liked how you added some lava shading on some ofthe textures - looks great!