The default texture of the tropical water in FSX is an ugly, bright cyan. Completely unrealistic, and also present in the wrong bits of the world!

 

I understand REX4 is out, but I'm going to try searching for a nice freeware deep blue or green, which more accurately reflects the ocean. I have never seen water like that IRL, being a native of Singapore. I have visited Bali, Many Thai islands, and a whole lot of "Tropical" islands. They still have relatively blue/green water (especially Singapore). 

 

Perhaps this is accurate of the Gold Coast, but even then, it seems oddly bright.

Give this a shot

 

http://www.strikingsoftware.com/fswc.shtml

 

It doesn't change the color but it can give you a different look

I will have a look at that, thank you!

The tropical water looks quite realistic for my area of the world, Arctic Norway. Many people don't know that even high up in the Arctic we have lots of sandy beaches and lots of corals (sadly a lot of them are being destroyed by fishing trawlers). The only difference is that the water temperature naturally prohibits swimming

In the UK, water is generally at worst brown and at best grey.  FS water looks so unrealistic, but I've never been able to find textures more suitable. 

 

I think I had a go at making my own once without success - time I had another go, I guess.

 

IAN