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Unity UI [Solved] Unity 2019.2.13f1 - Curious case of Breaking Batch

Discussion in 'UGUI & TextMesh Pro' started by Tinovdk, Jan 9, 2020.

  1. Tinovdk

    Tinovdk

    Joined:
    Nov 28, 2013
    Posts:
    83
    After combing through https://learn.unity.com/tutorial/optimizing-unity-ui and having tried things for hours I am at a loss about disparate results in UI draw call batching. I hope the Unity forum can rise to the challenge and offer a solution.

    Case 1 - ✔ Batches as expected
    Shopkeeper545.gif

    Case 2 - ✖ Breaking batches
    Shopkeeper546.gif

    Case 1 has 2 batches. One for the graphics and one for the text despite having a complicated and interwoven hierarchy structure. Perfect!

    Case 2 has 8 batches. Four times one for the graphics and four times one for the text despite having a simple hierarchy structure. The hierarchy does not contain any scripts or layout components. Each gameobject containing a graphic only has a Canvas Renderer and Image component. The "Label" gameobject only has a TMP_Text component. The "Names" gameobject only has a Canvas component. None of the four hierarchy groups have inter-overlapping quads or incorrect child order.

    I am at a loss. What else can I try to discover the reason for the UI batches to break?
     
    Last edited: Jan 9, 2020
    Tinovdk, Jan 9, 2020
    #1

  2. Tinovdk

    Tinovdk

    Joined:
    Nov 28, 2013
    Posts:
    83
    It turned out that one of the recttransform positions had a negative Z value that caused the batch to break. Totally overlooked that for hours. :oops:
     
    Tinovdk, Jan 12, 2020
    #2