I was asked to build a nerf gun and got carried away with the project. I modeled it in Moi. There are a few details yet to be added ( some text and a button is missing) but basically it's accurate. Nothing special about the light set up. One Dome light with HDRI but I think it needs a light in the front for the cartridge casing is that is a little washed out at the front corner. 
Cheers
Val

Cheers
Val
Comment