[RoyaleBeast]

Save as a .png to keep your transparency and then go to a site like http://www.coolutils.com/Online-Image-Converter.php to convert to the file you want while preserving the transparency.

Then import to VTF Editor, save as .vtf, make sure your sizing and resolution is correct for sprays and import to TF2 as you normally would.

(Saving as .gif from PS should usually keep your transparency as well but sometimes you lose quality of the image)

im trying thta but the file i get is not a bmp or anything its just "Spray 1" no .anything