Native allows streams to be created with names that exceed the maximum
length allowed by OLE storages. These streams can be used normally, it's
just not possible to commit such a database.

This works on cards that don't implement ARB_depth_clamp like r500
cards. Note that texturing is influenced by position.w, not position.z.

The Z disable part of the test is technically not necessary because the
fog coordinate is written before applying the projection matrix. I've
nevertheless included it because this is not immediately obvious and fog
is the only place where the vertex Z matters if depth test and depth
clipping are disabled.