Emmanuel,

I made a copy of the 880 byte start script, then added those six lines at the end of the text, starting on a new line.
I then ran the script and SH3D started normally.

However, when I try to make a test render in Q3 or Q4, the render times seem to be the same as always, as is the quality.

Did I do something wrong?
Maybe you could publish a working start script, so that we can experiment with these improved quality settings?

Hans