If you can post your game here on the forums?
Sure
You can announce your game here, and also post games that you have finished:
http://www.adventuremaker.com/phpBB2/viewforum.php?f=5
Make sure you add 1-2 screenshots (images) of the game.
The demo game by CBSection is already 500 MB, and the full game will be much more. So you can create really big games. It's just a question how many players will download huge games
I'm not sure what you are asking about the Cubic Plugin.
What do you mean with "images were not certain well"?
There have been problems for some graphic cards, but I think that for most computers those problems are fixed now, if you mean this.
Here was the announcement of the beta version (the first post contains some very good tips and links to tutorials):
http://www.adventuremaker.com/phpBB2/vi ... php?t=3588
And here is the announcement of the final version:
http://www.adventuremaker.com/phpBB2/vi ... php?t=3811