Mental Images FTP site?

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Hi,

I'm looking at writing my own shaders, and I remember seeing a post either here or on the XSI mailing list where someone had mentioned Mental Images FTP site where we could download the code for uncompiled shaders, for free. I'd be really interested in getting hold of a few to look at the code, try compiling them for XSI and then move on to writing my own.

Cheers!