Bad screeny.

8mb. are you joking? what did you put in that is so heavy? uber detalied geometries? 100 new mapmodels? 10Mpx textures?

bah. geometries aren't so much complex or detalied to be a good reason to use lightprecision 32; most of the surfaces are wide and flat, same for the lighting, wich isn't anything strange: lots of pale lights pasted in series;

lightprecision: 100
lightlod: 1
=
2,75 mb

same quality, and, with such low poly geometries I think we can even force it to get way lighter.

About the map:
The flow sucks. You get stucked every 2 jumps and that's way too much.

The gameplay [ctf] is very too much forced: the central train. it's a killbox. as far as i can see the most of the battle will be fight from one jumppad to the other one, giving very low chances to score or, giving too much power in an even slightly unbalanced game. The central train is a killbox and the other 2 are sniper's spots.

2 ways that can get it to work really better:

1- placing the bases in the central train, like in face-capture, and link properly the side trains; this will give you at least three ways to catch a flag.
2- placing the bases in the middle of the side trains and linking them to the central train at both the ends. This gives you 2 ways to catch the flag.
2.1 add 2 more "mid-ways". Your trains are long enought so: another jumppad between the flag and the jumppad at the end of the train, wich points directly to the middle of the central train, making that section sort of a shortcut, but without any cover.

Gee, I haven't done anything with Sauer in a couple weeks, time to see what maps are new.
I might as well start here, because I like trains.
This map reminds me imediately of various other moving-train maps I've seen (of course) but that's the first thing I noticed. The second thing is that in the train on the left (facing forward) there are noclipped circular things in the bottom level just floating for some reason in the middle of the room.

It seems completely arbitrary and unrealistic that you cannot get on parts of the front and rear cars because of clipping.

I thought I'd have more to say about this, but I don't really.

[++] Concept

I like the overall feel of this map, you really made it seem like you're actually moving along with these massive vehicles.
The sounds and the lighting are done in a competent way and help the atmosphere a lot.

[ ] Layout

Mediocre at best. There definitely is too much linearity and navigating these things becomes tedious and unsatisfactory after a while, because you don't have more than 1 general route to take between the trains.

[-] Geometry

I must concur with the others, it's really not very pleasant to walk through this map; getting stuck or missing a narrow walkway is too frequent. Surprisingly, the cargo areas (which I instantly frowned upon, because box spam usually destroys gameplay) were all right, but only on top. I imagine inexperienced players to have a lot of difficulty with this map.

[+] Overall design

Some nice ideas; I like the tanks and some machinery. It definitely shows you wanted to include more than just arbitrary structures.
The brush-modelling is also nice, definitely adds a lot of soul to this map.

[--] Texturing

Oh my. Please start practicing proper texture alignment. It seems like for most areas you simply selected the cubes and slapped more or less random textures on there (within the set, fortunately), but also some choices really break up the already fairly cripppled visual impression of this piece. What I will say is that the bases and the areas where you showcase some fairly nice brush-modelling look best (although the no camping sign is a nice gimmick, it doesn't fit at all, aesthetically).
The blendmap stripe on the tracks, not sure what's up with that. As it remains static, it kinda destroys the sense of movement if you look too closely.
All in all, the farther you zoom out / walk away from something, the better it looks. But that's to be expected, generally. :)

[+] Lighting, sounds

Nothing to complain about. I really like the headlights and the sound design. Bravo. (I mean, there are some odd light placements, but I can forgive a lot of that if it's functional.)

[?] Item placement

I only care about InstaCTF, so I didn't look into that.

[ ] Overall

I do think Sauerbraten could use maps like these; unfortunately the execution leaves much to be desired. It seems like you focused more on the brush-modelling for people to look at. However, most of that stuff is inside and I only found most of it by accident and what people will see first and will ultimately be annoyed by is the map geometry in general (and random textures).
Then again, I don't really know how much mapping experience you have, so if this is one of your first projects, a big thumbs up!

I'll give 5/10. "Compelling" is exactly what I'd call it, no more, no less. It has potential.