App icons problems uploading

Question

Created Oct ’15

Replies 5

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Hello all, I am having problems in the final stage with the icons i get this error ."Invalid image Asset. The image stack 'AppIcon Template' in Payload/XXXXX Asset.Car cant have transparency.' I do not have any transparency in my images . I get this 4 times then Invalid Toolchain error. Thanks in advance.

Answered by Bendermh in 78532022

I had found this problem too, because despite I had only one layer in the image file (or in the background layer of a Parallax icon) the graphic archive has an active alpha channel (I suppose that It was empty).

A very easy way to remove the alpha channel in a image is to open it in the default OSX image viewer program ("Preview") and then select item "export" in file menu, choose a supported image file format as .png and then in the export dialog you must to be sure to unmark the "alpha" option in the bottom of the window (If your file does not have transparency it will not appears). And then replace the old file in your project with this new file.

Remember to remove alpha in your top shelf image, launch screen and background layer of your icon.

I hope this could help you !!!

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Answer 1

Zwilnik OP

Oct ’15

It's probable the background layer pic of that image is a png that has alpha set still (the Photoshop exporter has an annoying habit of doing that even when it says it's not). If you load that layer pic into Preview and check the inspector it'll tell you if it's got alpha or not (if it has, export it as png and untick alpha or export it as a jpg).

What can also happen is that the particular item it's reporting is ok, but it's actually another one of them that has alpha in its background layer and it's reporting it wrong. So if that's the case, you'll need to check all your background layers for transparency. (also your Top Shelf image).

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Answer 2

Bendermh OP

Oct ’15

Accepted Answer

I had found this problem too, because despite I had only one layer in the image file (or in the background layer of a Parallax icon) the graphic archive has an active alpha channel (I suppose that It was empty).

A very easy way to remove the alpha channel in a image is to open it in the default OSX image viewer program ("Preview") and then select item "export" in file menu, choose a supported image file format as .png and then in the export dialog you must to be sure to unmark the "alpha" option in the bottom of the window (If your file does not have transparency it will not appears). And then replace the old file in your project with this new file.

Remember to remove alpha in your top shelf image, launch screen and background layer of your icon.

I hope this could help you !!!

1

Answer 3

pnb2001 OP

Oct ’15

I've had this happen after resizing an image in Photoshop. You can sometimes get a 1px alpha border around the image. Hard to see, but they pick it up. Check your build for warnings along the lines of "The pixel at position (0, 0) has an alpha value of 250"

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Answer 4

neilaj OP

Oct ’15

Thanks guys. The app works fine on the devkit, no issues. I will redo all my images and see what happens. I wonder if i will have to that for the lcr images that is on my client server?

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Answer 5

prabakaranmuthusamy OP

Aug ’21

Yes, I have faced this issue

So, make sure your sizes for 1x and 2x

Check sizes for App Icon and Topshelf images also the middle and back images

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