[ Bug 2024 ] 2020 compiled project will not draw polygons with default materials applied in 2024 sim engine

Version: 1.0.77.0

Frequency: Consistently

Severity: High

Bug description:
When you load a 2020 compiled project into MSFS2024 polygons with texture materials applied will not draw.

Repro steps:
Draw a polygon
apply a material
compile project in 2020 SDK
Load into 2024 community folder and load the sim
Polygon does not display.

Attachments:
MSFS 2020 with 2020 project in community folder with shapes debug turned on … Black polygon with default asphalt material applied works fine.

MSFS 2024 with 2020 project in 2024 community folder with shapes debug turned on … Black polygon with default asphalt material applied does not draw. (please excuse the cars)

@FlyingRaccoon another to log please.

We are seeing the same problem in all of our products. Attached is an example from one of them whereby the grass texture polygons added in the 2020 product do not seem to be rendered in 2024.

MSFS2020:

MSFS2024:

This is happening with ALL materials, not just grass, and seems to also be unrelated to coloration or transparency parameters.

I have the same issue in one of my airfields:

@EPellissier
Hi guys this is still an issue in the latest 1.0.86.0 build and quite game-breaking for a lot of our sceneries. Are we able to get this urgently looked at as polygon and materials compiled in 2020 should work in 2024 legacy mode. They currently do not.

We cannot use aprons instead because the polygons we use are outside of the airport boundary.

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