VisualElement with background repeat generates too many mesh vertices

Unity Engine
,
1

Hi,

We’ve noticed that visual element generates too many vertices and potentially get the limit error if it has a repeating background image. Number of vertices will increase with visual element size.

  1. Just background image, no background-size, background-repeat styles.

    9144385--1270690--upload_2023-7-13_17-10-25.png
    9144385--1270690--upload_2023-7-13_17-10-25.png1901×1052 115 KB

  2. background-size, background-repeat styles set.

    9144385--1270693--upload_2023-7-13_17-13-7.png
    9144385--1270693--upload_2023-7-13_17-13-7.png1899×1055 239 KB

Is it expected?

USS & Code

.mt-test-bg {
   background-color: black;
   background-size: auto;
   background-repeat: repeat;
   background-image: resource("UI/header-logo-mobile-white");
}

            var ve = new VisualElement();
            ve.style.backgroundColor = Color.blue;
            ve.style.width = 1000;
            ve.style.height = 1000;
            ve.AddToClassList("mt-test-bg");
            uiDocument.rootVisualElement.Add(ve);
2

We are aware of this issue. The current approach also has some background bleeding issues on the edges of the repetitions. We’ll look into it.