Answer by jayw

I had the same issue which was fixed by changing Detonator > Resources > Detonator > Textures > Smoke from `Normal Map` to `Texture`. ![JeffAU's image][1] Credit goes entirely to **JeffAU** from [this forum thread](http://forum.unity3d.com/threads/158580-Detonator-Issue-in-4-0). [1]: http://forum.unity3d.com/attachment.php?attachmentid=40692&d=1352943058