Sorry for the late in posting this. lots of job to do in the daytime, the sea presented here (well the master) was done during 2 evenings.
so here's the story.

there is no way i can reproduce a half transparent sea shore with another product than polyester resin

Then there is no way that i can produce some realistic waves just by sculpting them for the 10 minutes or so the resin will take to set

I then have to make a mold...