Noisy images when uploaded to Roblox

[DanishXDCPA (DanishThe)]

Hello,
Recently I’ve made some images for my entity. But here I’m only showing one.

They are made using Photoshop. I use the Dissolve mode brush to give it some “noisy” look. They are in the size of 512x512 pixels.

However, when I uploaded them to Roblox, they just get absolutely demolished in quality.

The noisy textures intended was those black and purple pixel-stains, and not these white squares. By the look, they act like some bounding boxes for the subject.
The same applies in-game:

How would I resolve this?

[JLW1009 (Grande1900)]

Try exporting in TGA so the color in 0-alpha areas gets preserved.
Also, what are the settings for your texture instances?

[DanishXDCPA (DanishThe)]

I forgot to mention that I used Quick Export as PNG, as I expected nothing wrong.
I’m not sure what you meant by via TGA and the texture settings, I went to Export section and did not find the word.

[DanishXDCPA (DanishThe)]

Found it, used Save As and selected Targa format.
I tried uploading to Roblox and;

What?

[JLW1009 (Grande1900)]

Try uploading through the asset manager instead, that worked for me.

[DanishXDCPA (DanishThe)]

It looks clean now!

However, I just learnt about transparency issue with TGA files and so I have to do the process for each image.
Other than that, thank you!