Triangulation error with rivers

[bnolan]

I'm trying to render brisbane, australia and there is an error with the triangulation of the river, see the following render:

http://i.imgur.com/apVLM.png

I'll investigate it further over time, but I was asking if you've seen this problem before?

[bnolan]

I've uploaded a sample png, osm and pov archive that shows the problem.

[bitsteller]

Thank you for the report.

I didn't see this kind of error before, other cities with many riverbanks (e.g. Hamburg, Germany) were rendered correctly.

I will try to reproduce the error and see if I can find a cause for the problem.