While not optimised for standard Q3 this level is perfectly suited for the type of gameplay it was intended for and those trees look just amazing. Minor issue: given the grapplehook is in play there are a few map objects and areas in the upper outer portions of the map that could have been better clipped off. But other than that a top job. That leaves me with no choice but to give it a 5 (4.8 if we still had the old rating system).
Edited 12.4 minutes after the original posting.

Some areas on this map are bit empty, i.e. single shotgun in large room.
And these triangle are very unusual, suitable for this design.

I love it. Very well done, and the ambience is awsome.