Show HN: Warsaw in voxels – An interactive 3D map of the city centre

stared 236 points 38 comments November 02, 2026
p.migdal.pl · View on Hacker News

Explore central Warsaw in voxels - slightly inspired by Minecraft, and MagicaVoxel. You can change the date, time of day and weather, explore the city, or click on a pedestrian to control them (here a bit of inspiration from Dungeon Keeper). Works best on desktop, but I tried to make it usable on mobile too. The initial load can take a while. It's based on several open datasets, including: - OpenStreetMap ( https://www.openstreetmap.org/#map=6/52.02/19.14 ) - buildings, streets, sidewalks, tram tracks, etc - GUGiK / Geoportal ( https://www.geoportal.gov.pl/ ) - LiDAR for building heights and trees, aerial imagery for colours - Warsaw's city tree database ( https://mapa.um.warszawa.pl/ ) - individual tree species, used for seasonal foliage Open-source ( https://github.com/stared/warsaw-vibe-voxel ), so feel invited to (re)use it as you wish!

Discussion Highlights (20 comments)

stared

There are quite a few such other projects, e.g. Streets of Prague ( https://beta.streetsofprague.com/ ), were one can explore Prague in a top-down GTA2-like mode, based on real data.

java-man

Is it raining, or are those rendering artifacts on a fractional scale monitor? edit: it is raining!

throw_a_grenade

A bit unfortunate it doesn't reach to the Old Town, or even Royal Palace. But impressive stuff nonetheless!

sixtyj

Mobile version reloads, imho it is too heavy for Safari. Well done. As default weather - I would prefer sunny day instead of rain…

camies

Really impressive. The autumn trees and the golden hour light make it feel alive, and the landmark labels are a nice touch. Fun to fly around the city centre.

wossab

For the longest time I wanted this as the interface for a Local News website I was participating in. It was impossible at the time but I hope it will become a thing. Sure beats HTML tables with text and pictures.

radicality

Nice. At first glance looks cool, but then, oh my, some areas are really butchered :S Poor Old Town and Plac Zamkowy - I'm familiar with the area and at first was scanning trying to find it visually by the features I know are there, but then in this model it's very different (wrong color, many more floors in this model, a 20-story building where at most should be at most a 5-story, the old town castle looking like a gray residential 'blok' and not the prettier structure that it is!).

harvey9

It was raining when I opened it. Is that tied to the live weather? It's really good, and responsive in Firefox on my android tablet.

ionwake

I really like this, not trying to be annoying but is the main point that we can walk around in first person or does it lend itself to be ported to minecraft or something? Sorry to be weird and ask. Very impressive though I like it.

lo_zamoyski

A fragment of Śródmieście (the downtown center of Warsaw). The Old Town and most of the right bank (including Praga) are missing. In any case, very fun. Hope it improves.

hollowonepl

small part of Downtown.. looks cool but instantly one wants more, especially if you know what this city can offer today and how rapidly it's changing its landscape!

wolvoleo

Wow such amazing work! I love it. I have good memories of my visits to Warsaw. Very walkable city so I spent a lot of time doing that (despite being there on tiresome work trips).

jesse__

It's almost unusably slow on my laptop. 3080ti mobile, windows 11, chrome. I opened the profiler and the update appears to be fast enough; roughly hitting 30fps, but there are massive gaps between updates and the actual frame time seems to be about 120ms. Other than that, neat :)

majorbugger

Unusable because of (lack of) performance. I have a laptop with a dedicated GPU...

Tade0

The voxel version of Złota 44 doesn't do it justice. I mean, just look at this thing: https://en.wikipedia.org/wiki/Z%C5%82ota_44

_whiteCaps_

I really enjoyed visiting Warsaw, I went there for work a few years ago and didn't really know what to expect. If you ever have the chance, I highly recommend the Warsaw Uprising Museum.

MisterTea

Super neat project but I am getting fractional (<1 FPS) frame rates in FF on Linux. Granted, this is an older AMD PC and certainly no power house but it used to run actual Minecraft just fine.

globalnode

just a black screen for me with some labels floating in space

hartator

this is cool, but not to be pedantic, voxels are usually way smaller. 1cm-10cm, these look like 1m.

rasz

This runs 10x too slow for what it is. Tell Opus about mip mapping, greedy meshing, maybe even zbuffering judging on how bad this runs.

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