Hi,
I searched this forum and the internet for some simple levels that I can use for my irrlicht game, but not with succes. I wanted to download levels because modeling is not my strongest side and it saves time. So to help everyone out that is in the spot as me here a little bit of help.
A couple of years ago I used Zmodeler to model cars for the game racer.nl. No car made it to the game was never satisfied with the model. But I know it has some .3ds export so I gave it a try yesterday. Made a simple box and exported as a .3ds file. It came for me as a suprise that the model was viewed correctly in irrlicht engine. So I started to made my own level just a simple one floor level I can use for my project. This worked good also the texture I made on it was good. So for people who tried everything like 3DMax, Maya, Blender or IRREdit and didn`t have succes I can just say that Zmodeler is a easy and fast program to learn. You can find Zmodeler on the following site:
http://www.zmodeler2.com/
There a two versions v2.1.1. and version v1.07. This one I prefer because I used it before and the GUI is easier to use.
Hopefully I help someone with this because it took me too much time to get what I want.
Fast and easy level making
You're fairly unlikely to actually find any level models online really, at least not any that would fit in with the style of your game (whatever that may be) unless you're really lucky...
One thing you could do is google up some Quake 3 levels as there should be loads of those available to download, though often they don't work 100% with irrlicht so it could be hard finding one that's compatible. In the meantime you could always use the Q3 map that is in the irrlicht media folder to get development underway.
Alternatively you could do what i did in my IrrAI examples and use IrrEdit to create some basic environments from cube scene nodes, very simple yet effective (at least for my uses anyway
)
One thing you could do is google up some Quake 3 levels as there should be loads of those available to download, though often they don't work 100% with irrlicht so it could be hard finding one that's compatible. In the meantime you could always use the Q3 map that is in the irrlicht media folder to get development underway.
Alternatively you could do what i did in my IrrAI examples and use IrrEdit to create some basic environments from cube scene nodes, very simple yet effective (at least for my uses anyway
)
Does ZModeller work for something else than cars? i hope so 
for level editing use Quark and Radiant. It is what i used some time ago, Radiant has the tools you need to compile maps and QuArK has the modelling abilities along that it can include complex entities from quake, in the meaning of modelling quake III levels. It is very hard to find levels out there for a simple reason, either they're already intended for another game. Or you could perhaps try and find another sources of content.
In that meaning, perhaps the comunity of Torque Game Engine have a lot of content, ready for torque indeed, but also, they use to include the source of their torque content in the form of MAX files, or MAP files, so, theoretically, you could re-compile those to the formats irrlicht accepts too. They sell those contents for a reasonable price.
And of course, Irrlicht offers very basic primitives to work with them directly.
for level editing use Quark and Radiant. It is what i used some time ago, Radiant has the tools you need to compile maps and QuArK has the modelling abilities along that it can include complex entities from quake, in the meaning of modelling quake III levels. It is very hard to find levels out there for a simple reason, either they're already intended for another game. Or you could perhaps try and find another sources of content.In that meaning, perhaps the comunity of Torque Game Engine have a lot of content, ready for torque indeed, but also, they use to include the source of their torque content in the form of MAX files, or MAP files, so, theoretically, you could re-compile those to the formats irrlicht accepts too. They sell those contents for a reasonable price.
And of course, Irrlicht offers very basic primitives to work with them directly.
"There is nothing truly useless, it always serves as a bad example". Arthur A. Schmitt