I’ve had an issue with this for a bit, and I’m not sure how to fix it aside from adding a tint, which I only want to do as a last resort.
Whenever I upload a monotone image, the opacity gets messed with and the image itself is distorted.
Examples of this are here:
The images should be like this:
The images are also distorted in studio too, not just on the site.
I’m not sure how long this bug has been around, or if I’m simply doing something wrong.
Try opening the images on other sites. Also, I recommend you use Photoshop. You can also create some other Roblox account, and try there. Worst case scenario, use a free decal that fits what you want.
What file type are you using? I just uploaded one of those decals myself as a png and it works fine.
Apparently this is still an issue. 
Unable to upload some images to Roblox without failing or mangled results
A post was merged into an existing topic: Unable to upload some images to Roblox without failing or mangled results