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I was planning on creating a gaming board involving a river and various crossing points, i just wondered if anyone had any tips as to creating the water effect and bridges. thanks
All depends on how you want to model the river. Tell us more about your design style.
paint the riverbed a mix of grey and blue and let it dry. as far as water goes, just buy some of the fake water used for model train dioramas at your local hobby store. pour it in and let it dry. that should look good enough.
adding something called 'water effect' will give you the white water effect you might be looking for. this is also available at your local hobby store.