Blender 2.92 not saving alpha values properly

[DNorman]

Might be related to this

Blender exports semi transparent alpha as fully transparent

I setup nodes in compositor to get partially transparent object. It all looks proper in blender compositing, however once I export to .png or .tif the partially transparent area becomes fully transparent in the saved file… Does someone know how to fix this? [semitrans]

I recall another similar thread but can not find it. Try using TGA or exr. (they did not say if it was a solution in that thread if it works in TGA let us know.)