It wont ruin the glows, im sure you have seen the cannon freelancer made. It was with global illumination and for HDRI go on www.deviantart.com and search HDRI pack there are lots

ok, thanks, also, do you know if that'll fix the red line on the tank?

I dont know how it got there it was good on the previous 2 images

it's the top I put over the light, but I don't know why it's causing it.
I also added volumetric lights, but I took that off, and it's still there :/


EDIT: gawd damn it takes way longer to render with global illumination on :/