I am having a problem whenever i import a transparent png texture to the UE4 editor all the transparent parts become filled, why is that ?
Instead of the transparent part you have to create an alpha channel:
- copy one of the channels (e.g red)
- select it and deselect all the others
- go to Image-Adjustments-Level
- now change the arrows in the new window so that the part, which shouldn’t be cut out is white
- save it as a tga
Did you set your Material to be translucent? Also make sure, to connect your images alpha to the opacity of your maetrial afterwards. That did the trick for me yesterday.
Normally when you just want to get rid of the black/white/… background you connect the alpha channel to opacity mask + set the blend mode to masked.
e.g
(left = translucent, right = masked)
That was my problem thanks 
great, thankyou that worked for me
I’m not sure if this is the same problem but I was having an issue where if I rendered an image in blender, modified it in gimp and exported it to an RGBA 8bpp png, it would have a blue background instead of transparent in Unreal Engine 5 when it imported it.
I was able to fix it by double clicking it in unreal engine and changing the Compression Settings to Default (DXT1/5, BC1/3 on DX11).
Oh I changed sRGB to true as well because I noticed that was different from other imported png’s I had but I’m not sure if it matters.