[v1] Masked images disappear on resize if there are images using the normal Unity mask

[SvenRH]

Describe the bug Softmaskable images disappear when game is resized when there are are images using the unity mask in the scene.

To Reproduce Steps to reproduce the behavior:

1. Create new project, add Softmask and Demo
2. Open Soft Mask Demo
3. Resize Game View
4. masked images disappear

If the images using the 'normal' Unity mask are removed, everything seems to be fine.

Expected behavior SoftMask should work when there are Unity Masks used in the scene.

Screenshots

Environment (please complete the following information):

• Version 1.0.0
• Platform: Editor (Windows), Standalone(Windows, Android)
• Unity version: 2020.3.0 (also happened with several 2020.2.x versions)
• Build options: Defaults - New Project with 2D template

[SvenRH]

The issue seems to be that the RenderTexture is recreated on resize, but the new Texture isn't applied to the SoftMaskable.

A possible fix would be to add the softMaskBuffer to the _effectMaterialHash calculation, but it seems like it would be a better idea to just set the Texture outside of MaterialCache (seems like overkill to recreate the material just for that).

[Runelink2]

Is there any update on this? The fix mentioned sounds nice but I'm not sure how to apply it.

[NotGeniusy]

I made a script that disables and re-enables SoftMasks to refresh them. It worked for me. Just place this script to every GameObject with SoftMask.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Coffee.UISoftMask;

public class SoftMaskFixer : MonoBehaviour
{
    private SoftMask softMask;

    private List<GameObject> childs = new List<GameObject>();

    private void OnRectTransformDimensionsChange()
    {
        if(softMask == null)
        {
            softMask = GetComponent<SoftMask>();

            foreach(Transform child in transform)
            {
                childs.Add(child.gameObject);
            }
        }

        if(gameObject.activeInHierarchy)
        {
            StartCoroutine(Fix());
        }
    }

    private IEnumerator Fix()
    {
        foreach(GameObject child in childs)
        {
            child.SetActive(false);
        }

        softMask.enabled = false;

        yield return new WaitForSeconds(0.01f);

        softMask.enabled = true;

        foreach (GameObject child in childs)
        {
            child.SetActive(true);
        }
    }
}

[mob-sakai]

Please try v2: https://github.com/mob-sakai/SoftMaskForUGUI/releases/tag/v2.0.0

• ⚙ Installation

[mushakushi]

I'm able to reproduce this issue on 2.2.0 with Unity version 2022.3.16f. There are some instances where the image flickers before disappearing when the canvas is actively being resized.

[mob-sakai]

Thank you for your reporting!

• Does it occur only in the editor?
• Can I attach videos or gifs?

[mushakushi]

Does it occur only in the editor?

Yes and regardless of if playmode is enabled.

Can I attach videos or gifs?

https://github.com/user-attachments/assets/3f733bc2-a361-45b2-a737-8adeb9a0eeb5

Thank you for your quick support!

[mob-sakai]

@mushakushi I created a new issue: #184