I'm not using any fp textures for the moment. But you can change the textures to a floating texture if you want (just change the vars according to the manual) and the shaders will use it.

William's problem had to do with a watershader he's using. The whole depthmapshader got clipped away. I have to write a note in the manual about that.

I also just noticed the depthmap shader isn't supporting textures with an alpha channel. Expect a fix for this soon