hmm found a strange bug:
when using a 16bit fp texture i can render the shaderresult to a rt and use it lateron in another shader as mtlSkin.
however when using a 32bit fp texture the texture gets changed on the fly o_O eg. I render the result of the depthbuffer to a tex called s_bmap_depth. Now i create a stage that blurrs the depthbuffer. Now when i want to use the unblurred texture it doesn't work, it's also blurred. This is really strange.

So when you are changing your shader to use an fp texture, first try it with a 16bit fp tex.