I don't get it - why use vector graphics, export and convert (like svg2phun) instead of using simple and better-looking textures? Tribute to old good phun 4? Step ahead! 7/10, don't take it bad.
2ndrummer: I think you did something wrong I've check on different PC with other old video card and clear installation of Phun 5.28. Working fine after I turn on anti-aliasing in Phun: Options -> Rendering -> [x] Enable anti-aliasing through shaders