Blurry/Incorrect Rendering of Sprites with URP "Pixel Perfect Camera (experimental)"

Unity Engine
1

Hello,

I’ve been trying to use the Pixel Perfect Camera (PPC) in my Unity 2D project with the URP. The behavior I am getting is a bit counter-intuitive, that is, the use of the PPC in my project causes my sprites to blur/render incorrectly. The primary sprite effect is the sign sprite, but the character sprite is effected as well if I enable Stretch Fill (which I have been leaving off).

This is what my scene looks like without the PPC attached to my main camera:
6934545--814479--without_ppc.png

I would expect my scene to look the same as the above image as I know what the sprites should look like, but once I add the PPC the sign sprite looks like this:
6934545--814476--with_ppc.png

As a reference the actual sprite for the sign is:
6934545--814485--genric_sign.png

PPC component properties are as follows. I have noticed that if I change the APPU to 15 or 17 the sign seems to render correctly (or at least as far as I can tell), but then the character sprite acts up.

6934545--814500--ppc_settings.png

Wonky character sprite after enabling Stretch Fill (notice how the top leaf on her head is now cropped).

6934545--814503--stretchfill_ppc.png

I’ve tried to the best of my ability to follow the instructions here (2D Pixel Perfect | Universal RP | 7.1.8) but I I am having no luck.

For reference the sprite sheets have a PPU of 16. The intended resolution is 640x360 (which is 16:9), and the idea is if someone full-screened the game what they would see is an upscaled version of 640x360 rendering.

Does anyone know what I might be doing wrong or how I could go about getting to the bottom of this?

Thanks,

2

Enable pixel snapping or move the transforms for your Sprite such that it doesn’t fall within a fractional pixel unit. That’s my guess anyway. that being said I have never ever ever found a need to use the 2D pixel perfect camera. It’s much easier to just set your screen resolution as a multiple of your Sprite size.

1 Like
3

Thanks for the advice. I’ve tried making sure both the camera and the sprite have integers for their position values, but this made no difference. I have also tried pixel snapping with no luck. I do notice that if I move the sign around, its appearance changes a bit (mostly its black outline), but it is rendered incorrectly.

I find this very strange as the PPC says that the pixel ratio is 1:1 (which would make sense as I have the game tab set to be 640x360).

Out of curiosity I set the reference resolution on the PPC to 320x180 and things appeared to render crisply. Of course I can’t use this reference resolution as then I don’t see everything on screen that I would expect to see since everything is now “larger”.