what is your idea about UDk,A7,UNITY3D?

you cant compare udk with a7 or unity. It's AAA level engine but requires an AAA level team too

yes a7 is more easy to use
udk have to pay 2500$ per game and 25% comission for all the sell
unity3d appear to be the best but for me is to much complicated
the only think will be more better A7 is a webplayer

UDK is actually $99 for a commercial license for a game, and 25% royalties for sales above $5000.

A7 is way more straight-forward, but UDK has stacks of built-in stuff for people who don't like to program some stuff themselves.

I haven't downloaded Unity Free yet.

Jibb

webplayer is interesting for small game and puzzle game but not fitted for an fps or an rpg. So maybe many developers claim doing innovation instead of graphics but for me even if unity has great tool I haven't seen a single game capable of doing what the ue3 showed many time in many game ( gow, batman, bioshcok etc ..; )
I only see iphone dev. I've to say to all iphone fans, ther eis no real point doing game on iphone since there is too much pollustion on apple store to get your game sold.

So don't say unity is best because it has really specific features like webplayer, but don't support shadow for example.

May i correct you? Does only support static shadows in the free version but realtime shadows in the pro version.

Lightmap you mean ? I haven't seen anything like that in the features but it's a quite possible. I know there is a weird system with decal but it didn't make real sense to me. But yeah for the pro version it supports real-time and render to texture. But the problem is most users and new users will use the free version or did use the indie one.

About the lightmap can we bake it in level ? ( It would make a huge difference for me )

Yes sorry i mean lightmaps. It's not a built-in feature yet (afaik) but there are several scripts in the forum and in the wiki to use an ingame lightmapper and someone is currently creating a BSP creating tool with lightmap support:

http://forum.unity3d.com/viewtopic.php?t=35498

The decal system you mean uses a texture projector to project blob shadows for example.

And you can always bake your shadows in a model tool too if you know the lightning settings for your scene. Of course it's more work but well, it's the free version of Unity.

Does UDK has import from 3DMAX/MAYA/ZBRUSH?

and

what is output?pc/psp/ps3/xbox?

thanks.

why does one not check the site of UDK and features page but asks about it here?

only pc. imports from max