[Therion] How to draw water area with an island

[Bill Gee]

Is there a way to draw a large area of water, then draw an exclusion or 
island in the middle of it?

I drew some rocks in the middle of a water area.  They partially block 
the water symbol - but not entirely.

I drew a border around the island area.  If I use either -outline in or 
-outline out, then the entire area becomes opaque to everything.  It is 
drawn like it is a column.  If I do not use the -outline option, then it 
has no effect at all.

I also tried making the island border part of the water area.  No change.

One way I can think of to do this is to draw the water as two areas, 
each of which goes half-way around the island.  It would work but seems 
a bit complicated.

Suggestions?

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Bill Gee