Bifrost

Cute map.  A testament to the power of curve-tool abuse (in a good way).  Great opening shot where you walk forward and reveal the panorama of the whole map in a pretty way.

In one way, it's a just a topologically simple, semi-symmetric hub-map that branches into 6 "combat puzzle" set-pieces;  But when such a "simple" framework like this is executed on well, it serves as a strong backbone for beauty.  Woven into, around, and throughout this structure is a striking visual motif: frosty white brickworks surrounded by white void, with bright rainbow ribbonry shining through and connecting it all together.  Implemented in each corner is its own distinct sub-element: some sort of the said modest "frosty white brickwork" that teleports you to a set-piece fight in the white void; all of which abiding well to the overarching, cohesive framework the designer set out to fit everything into.

It's not galaxy-shattering, but an excellent single map with it's own identity and is worth checking out.  Give it your 10-15 minutes.

Also PS: there's a free megasphere in the center you can grab anytime... don't brute-force your last fight with 1% hp like I did.

while it's snazzy and lovely with the rainbow bridges and the serene feeling you originally get, there's not much else to really note other than Bifrost being a "collect six keys from six areas and exit" map. basically, you get the rocket launcher and plasma rifle, then go through six distinct teleporters for six distinct setpieces.

one area has the key, lots of rockets, and mancubi on rainbow stairs.

one has you in an arena with arch-viles and rockets.

one has you running quickly across a rainbow bridge under arachnotron fire until you telefrag them.

one has you fighting two cyberdemons on two sides of a rainbow.

one has you at a three-way intersection with several barons to kill.

one has a spiderdemon firing at you while arch-viles also teleport in, then you telefrag these enemies.

don't get me wrong, the thematic presentation is excellent and the difficulty is there. but I can't help but feel like there should've been much more excitement out of this. would definitely love to see more rainbow themes of course, just with more exciting gameplay styles.

Very colorful.  Many interesting arena fights.  Bonus points for letting me telefrag spiders.