Thanks PatJS, ah that's what is happening then as my diffuse is very light grey currently. I'm using a reflection map in UDK but as you say, not a lot is coming through as the grey is limiting its effect.
If you want a chrome material, you are going to need a much darker diffuse color, and a very high specular. Also you will need a cube map; A phong specular isn't good enough. For something perfectly mirror-like, you want it to be black. Here's an example I whipped up: As far as I can tell, chrome isn't quite as reflective…
Your fire has no hard edges. Chunky, splatty looking sprites will probably serve you better. check this out: http://www.cgtextures.com/texview.php?id=19040&PHPSESSID=f12a67f1ec4a28926813d62bfe3a2a0e There appears to be some blending within the shapes, but very hard edges on the outside. There are even some hard edges on…