Alpha issue

[ErsoTerso]

When I use PNG images from Rive in Unity, there's a white border or white area around them after I build the project. What could be causing this?
This issue occurs when using nested artboards, causing white halos around alpha-transparent images. How can I fix it?
This issue didn't exist in 3.3.

[ErsoTerso]

I also tried using the images as Referenced, but it didn’t work either. There seems to be a problem there as well — it uses RAM like crazy and slows down the computer. And I only set a tiny PNG file as Referenced.
with Referenced

without Referenced

[damzobridge]

Does this only happen if you're using an additional material when displaying your Rive file?

Also, setting an image to Referenced won't affect the way the image looks.

[ErsoTerso]

I encounter this issue whether I use a custom material or not. I don't think it's caused by the nested artboard — I've done a lot of testing. I even created a new project in Unity, installed the 3.6 package, and ran clean tests, but I still couldn't figure out the cause.

[damzobridge]

Could you share a small repro project with a rev+riv file so we can debug?

[ErsoTerso]

For example, you can take a look at this — screenshots from different Unity projects. You can try it with any raster image that has a mesh.
https://we.tl/t-PpgJ4kQTOs

[damzobridge]

It looks like this is only happening with the OpenGL graphics API? Is that what you're using?

I'll bring this up with the rendering team, but in the meantime, switching to the Vulkan graphics API should address this.

[ErsoTerso]

yes I am using OpenGL.
Thanks I will try using Vulkan.
It doesn't always happen, I tried many things but I couldn't understand when it happens.

[ErsoTerso]

In rasted, random white patches appear in the images unpredictably — sometimes they show up, sometimes they don't

[damzobridge]

Is that also in OpenGL? Or is that happening with Vulkan as well?

[ErsoTerso]

Vulkan is flawless in this regard, but I experienced other problems — UIs disappear and colorful squares appear.

[damzobridge]

Vulkan is flawless in this regard, but I experienced other problems — UIs disappear and colorful squares appear.

Are these issues happening in the Unity Editor or on a mobile device? If so, which device?

[ErsoTerso]

in my device Redmi note 13 android 15. Everything is normal in the Unity editor.

[ErsoTerso]

[ErsoTerso]

There is no such issue with Vulkan, but I experience many other problems like the screen flickering with colored squares or UI elements disappearing.