1st make your renders less blurry
2nd make them bigger, 640x480 for untextured models and 800x600 for textured ones, if you show them from more than 1 side.
3rd stick with a style, a bit more uniformed look of your renders make a much better impression of your mod. Few things you can do to achieve this: same colour of background on all renders and all untextured models should have the same colour, except maybe for the housecolours. see these 3 links for examples:
http://img242.echo.cx/img242/5364/m1a2abrams0oj.png
http://img151.echo.cx/img151/1074/kurtz36kq.jpg
http://img129.echo.cx/img129/9093/ch...lycetr11sv.jpg
remember, once you pick your style (and model colour) stick with it.
4th add a mod logo, or some simple other stuff to the renders, be it either the name of the unit/bulding, mod name and site address. But don't let it be too dominant, the models should still be the main motive of the image. Again stick with one style.
5th make better renders, by placing lights in the scene. The most simple thing to do is to place a "skylight" (if you're using 3dsmax), turn on the shadows and set "rays per sample" to 15. The result is nice, but it take a while to render. Other choices are puting omni or some other type of lights in the scene and to put it simple, make it look good. The positioning and light settings are left to your experimentation.
6th i see you have some basic texturing knowledge, but you should improve it. See these 3 tutorials for theory on texturing:
http://poopinmymouth.com/process/fal...e_geometry.htm
http://poopinmymouth.com/tutorial/tex_theory.htm
http://poopinmymouth.com/process/tips/dirt.jpg
And be sure to visit forums where more experienced people post their work, they are a great source of inspiration and reference. One particular is the polycount forum.
http://boards.polycount.net/postlist.php?Cat=0&Board=2
7th enjoy modding
