2 Likes
I found this one and others like it under “rust,” just be sure to turn transparency down when you find one you like.
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If I was you, I’d do it on Photoshop. Or a photo / paint editor.
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Dirt. I found them by searching “dirt”
Textures.com calls them “alpha masked decals”:
Textures for 3D, graphic design and Photoshop!
Regards.
1 Like
Search Dirt
.