[BUG] Map flickers when using tileBuilder on Impeller

[YarosMallorca]

What is the bug?

When using the tileBuilder in a TileLayer and Impeller renderer (the default on Android & iOS as of Flutter 3.27), line artifacts appear when zooming out or moving the map.

Impeller without tileBuilder (normal behavior):

normal.mp4

Impeller with tileBuilder set to darkModeTileBuilder (artifacts):

artifacts.mp4

How can we reproduce it?

Put a Flutter Map with a TileLayer widget, and apply a TileBuilder, like the darkModeTileBuilder.
Then try to move and zoom, navigate around the map.

Do you have a potential solution?

I stuck to disabling the Impeller renderer in AndroidManifest.xml and Info.plist for now.

Platforms

Tested on Pixel 6 and iOS Emulator

Severity

Obtrusive: Prevents normal functioning but causes no errors in the console

[ReinisSprogis]

I have not looked into source code, but I had similar issue when trying to implement CustomPainter to render tiles. It was Anti-Aliasing causing this. Perhaps disabling it wherever it color is set, will remove ghost lines.

[mootw]

does this issue exist in flutter 3.24.5?

[YarosMallorca]

@mootw The issue is reproducible on the latest stable - Flutter V3.27.1

[mootw]

Understood, however, is the issue reproducible on flutter 3.24.5? The latest stable release has many known rendering bugs, some of which appear to affect flutter_map. So i want to confirm that the issue is isolated to flutter_map, and not a regression with flutter itself.

[YarosMallorca]

@mootw Yes, it is reproducible on Flutter 3.24 as well.