[SUGGESTION] Advanced Options tweaks that should maybe be default

I got Acer x1930 set with

Windows 7 Home Premium 64-bit
Intel Premium processor G630
Intel HD Graphics Family
4GB DDR3 Memory

That is neither old nor shitty, it's less than 18 months old so should be able to play Xonotic OK on lower settings with the onboard graphics.

Take a look at this wiki page, all of the systems you see listed as 'Sandy Bridge' are the same generation CPU/iGPU as yours. OK, some may be a little faster but it should give you some idea of what is possible:
http://dev.xonotic.org/projects/xonotic/...quirements

What I would however suggest if you are serious about playing games is to upgrade to a separate graphics card. This does not need to be expensive, a Geforce GTX650 is €100 and would allow you to play the game on Ultra settings. If you do not want to spend so much money then even a €30 card will allow you to run the game on high settings. You have a fast enough CPU that the performance increase will be massive and Xonotic will feel like a whole new game for less than the price you'd pay for a commercial game.

Your CPU is roughly as powerful as my 5 year old E8200 which with a 9600GT (also 5 years old) can get over 300fps on Low settings and over 80 on Ultra. This is the sort of performance difference you could be getting for not much money.

Tweaking r_wtf and cl_make_everything_look_like_it_was_drawn_in_paint will only get you marginal increases, a hardware upgrade will give you massive improvements.