After 1.5 week of intense and stressful work, I can release a beta of my new track. It's a remake of the track Island.
First I want to thank everyone who get involved in this topic and especially 0zone0ne for his beautiful concept art.
Now many people contributed on the topic or on IRC. Unfortunately I wasn't able to include the idea of everyone. In a nutshell:
The cruise ship: I will probably add a cruise ship (it will be part of the landscape and she will move on the background). But I won't have the time soon and my priority is to finish the track.
The volcano: It's a classical cliché
. Unfortunatly putting 2 different theme in a track is difficult with the new engine. Basically STK engine uses the sky color for the general hue of the track. If the sky is red/yellowish the whole track will have nice warm and red reflexion. If the sky is blue (which is the case in the island) the lava will have a blue hue. That won't work 
.However 0zone0ne, I guarantee, your concept art will be used for fort magma, and I might add a little volcano in Gran Paradiso.
Hiker your idea of a part of the track that will be only accessible at low tide is included, also some characters will build sandcastle.
Now I think I'm ready to show you the track.
The general layout is similar to the old track there is minor changes and two alternate "secret" road.
It's a tropical island in the Caribbean region. There is an off road section on the beach.
Some pictures
A satellite view
The view of the coral reef from the beach
The lagoon
Airport welcome sign
The main terminal
People enjoying the vacation (beach balls are animated and yes I will add more diversity with different characters like tux, xue, etc)
Bonus
I have also converted some karts to use the new engine.
