I am working on adding decals to one of my trailer renderings. I have the file I want to bring in as a decal but I can not get the decal to just be the out line of the sticker that we put on it keeps coming in as a square. Does anyone know how to fix this I have just recently started using Photoview360 to render photos.

The white on the outside of the black lines is what I am trying to get rid of.

Thanks,
Dustin