Fixed the issue of not displaying when rendering multiple tilemaps

[qiuguohua]

Re: #

Changelog

https://forum.cocos.org/t/topic/167470/11

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Continuous Integration

This pull request:

• needs automatic test cases check.

  Manual trigger with @cocos-robot run test cases afterward.

• does not change any runtime related code or build configuration

  If any reviewer thinks the CI checks are needed, please uncheck this option, then close and reopen the issue.

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Compatibility Check

This pull request:

• changes public API, and have ensured backward compatibility with deprecated features.
• affects platform compatibility, e.g. system version, browser version, platform sdk version, platform toolchain, language version, hardware compatibility etc.
• affects file structure of the build package or build configuration which requires user project upgrade.
• introduces breaking changes, please list all changes, affected features and the scope of violation.

[github-actions]

Code Size Check Report

Wechat (WASM)	Before	After	Diff
2D Empty (legacy pipeline)	1005779 bytes	1005779 bytes	✅ 0 bytes
2D All (legacy pipeline)	2669491 bytes	2669410 bytes	👍 -81 bytes
2D All (new pipeline)	2757998 bytes	2757917 bytes	👍 -81 bytes
(2D + 3D) All	10013882 bytes	10013801 bytes	👍 -81 bytes

Web (WASM + ASMJS)	Before	After	Diff
(2D + 3D) All	16831071 bytes	16830990 bytes	👍 -81 bytes

Interface Check Report

This pull request does not change any public interfaces !

[star-e]

@cocos-robot run test cases

[github-actions]

@qiuguohua, Please check the result of run test cases:

• Test Platform: PR-Test
• Editor Version: v3.8.7
• Task Result: PASS
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/3c909da1-5917-4623-9fdd-e985574a3df8/-1
• GitHub Action: https://github.com/cocos/cocos-engine/actions/runs/14897166092

Task Details

[github-actions]

@qiuguohua, Please check the result of run test cases:

• Test Platform: PR-Test
• Editor Version: v3.8.7
• Task Result: PASS
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/cbe62895-2a2a-4556-85c2-3fdb7cc7d523/-1
• GitHub Action: https://github.com/cocos/cocos-engine/actions/runs/14897166092

Task Details

[xiehande]

感觉大佬回复。不知道这个测试是做什么。我进行研究是发现了tiledmap上如果是图块集和格子相同不会闪烁错乱。如果不同则会闪错。我可以把demo发你看看。可以把地图的图层闪掉。用一个新的来，试下就知道了。可以使用cocos自带的原生模拟器也可以跑出来的。

[xiehande]

大小太大没通过。你可以试试这个楼主的demo也行。把图集块的大小强行改成和格子大小一致。应该也不闪了。比如我的格子是5050.

这个大小是128.有问题。

这个格子是5050.渲染没问题

[xiehande]

cocos_tiledmap_test.zip

[xiehande]

我提交了一个demo。方便大佬看看。地图里面的，1001是没有问题的，1002的是有问题的。你看下地图的格子就知道了。

[xiehande]

经过大量测试。发现tiledmap只要有多余2层时候，就会闪烁。这个只能靠你们尽快修复下了。跟图集块大小还没太大关系。如果只有一层的情况下。随便丢不同的格子的大小都不会闪。

[xiehande]

混用不同格子大小的图集块就会出现渲染闪烁

[xiehande]

222.zip 这是测试demo。非常简单，只有2个图集块即可重现