I was able to solve the problem.

Instead of using asset.get_ui_image() and pass it on to SpriteNode(Texture(..ui_image..)) I got a PIL image directly with asset.get_image() and transformed it with the scripts found here to and ui image.

relevant from above link:

# pil <=> ui
def pil2ui(imgIn):
	with io.BytesIO() as bIO:
		imgIn.save(bIO, 'PNG')
		imgOut = ui.Image.from_data(bIO.getvalue())
	del bIO
	return imgOut

I hope you find this useful google hero from the future. This solves “weird false inverted colors for PNG ui.image from assets in photo module”.

Helps for the effort man!

Did that. No color invert. So it’s the asset.

I have no idea how to access those imported files(never done it). This is not the way it seems. Can you help me out ?

So the photo module as asset is the issue.

Can you change the texture with .yourSpriteNode.texture = Texture( image ) ? I suspect it might be the assignment where it happens. Not during initialization.

The file is fine. The display as SpriteNode is the issue. JPG gets rendered correctly PNG not. I have many other PNGs, all seem to be color inverted when displayed as a spritenode.

relevant code

def prev_image(self):
		if self.current_album_pic_id <= 0:
			return
		self.current_album_pic_id -= 1
		
		self.canvasSprite.texture = Texture( self.get_current_image() )
		self.rescale_canvas() 

def get_current_image(self):
		image = self.get_current_asset().get_ui_image()
		return image

here is the image from my album and a screenshot from my app

So I am working on something that involves the photo and scene modules. I take a photo from the photoalbum and display it as SpriteNode on the screen through Texture. However, I noticed that some pictures get displayed color inverted this way. I figured out that it seemed to be when the images are PNGs, JPEGs are just fine. To solve this, I could run an color inversion filter if the asset is PNG, but I would like to know where the problem comes from in the first place. Any advice ?