Every time I add a texture with turbulence to an object in WED; when I try to build the level it just says:

-----CRITICAL ERROR-----
E003 - no visible blocks in map

Please help. Thanks in advance.

You have to provide potential helpers with a little bit of more information.
Do you have any other block with a common texture in the level?
What is the size of the texture? Does it have an alpha channel?
Which version do you use? Do you use blocks and/or models?
...

Thanks for the advice, I'll post more info on a new message so other people won't think it's been replied to.