Unity 4.3.1f1 - Problems importing (some) PNG files as 2D sprites

Unity Engine
1

I’m working on some 2D HUD graphics. I’ve created them all in the same graphics application (Xara Photo and Graphics Designer 2013) and have exported each to an independent True Color w/Alpha PNG file.

However, some of the files are giving me trouble on import into Unity. Upon import of a problematic file, I get two errors in the Editor console window:

  • CompareApproximately(dstRation, srcRatio, 1.0f/32.0f)
  • !hasError

Then, if I try to drag the sprite’s node from the project tree into my Scene view, I get the following error in the console:

  • Texture being dragged has no Sprites. UnityEditor.DockArea:OnGui()

You can see all the mentioned errors, as well as the import settings for a problematic sprite in the following screen shot:

1467469--80436--$UnitySpriteProblem.png
1467469--80436--$UnitySpriteProblem.png1001×603 111 KB

Interestingly, not all of my PNG files are giving me trouble, though I haven’t been able to determine why some work and others don’t.

I’ve attached one of the problematic PNG files in case it’s helpful. Any thoughts?

Jeff

1467469--80437--$Go.png

2

I got no problems importing your image. I’ve the same version as you!
I just Drag and Drop into unity’s folder. No erro at all. Did you change anythink in the file?

Try to delete and import again into Unity.

3

Thanks for taking a look. No, I haven’t changed anything in the file. Though, I did once open it in another graphics app and re-save it as a new PNG - thinking that maybe Xara had a bug in it’s PNG export format. However, that didn’t help either. And, yes, I’ve tried to import the problematic files multiple times…

One likely difference between your setup and mine is that I’m running Unity in OpenGL mode as I can’t get it to run in DirectX mode since upgrading to 4.3.x.

Thanks again.

Jeff

4

Here’s another example of a basic sprite import problem.

1468348--80553--$UnitySpriteProblem2.png
1468348--80553--$UnitySpriteProblem2.png774×638 150 KB

If you compare the (correct) image of the sprite in the lower-right with the (incorrect) image shown in the Scene view, you’ll see the Scene shows roughly the bottom 2/3 of the sprite and then (apparently) stretches it to fit the original sprite dimensions.

This sprite was also problematic to import. The actual image is 1304 x 676. If I change the Sprite import “Max Size” setting to 2048 (as I should), the sprite fails to import (same errors are reported above). If I set it to 1024, it does import but gives the results you see in the screenshot. Other smaller import dimensions also do the same basic thing (512, 256, etc).

Is there some fundamental thing I don’t understand about importing sprites into the new 2D system, or is it just buggy?

Thanks,

Jeff

5

It seems like the problem happens when Format is set to Compressed(In Import Settings). Any other option works fine

6

I wouldn’t ever use the Compressed setting anyways, it is way too aggressive of a compression and really destroys the image, even if it’s just a solid color, it will make it some other off-color.

7

I’ve experienced the same error message while trying to import a large sprite-sheet. I eventually resolved it by changing my sprite sheet from a single row of sprites (eg. 44 x 1) to a grid of sprites (eg. 11 x 4). For whatever reason Unity was immediately happy with the second style. YMMV… posting just in case it saves someone else any time!

8

44 sprites in a row? What was the resolution width of your sprite?