Flickering artifacts when terraforming TIN bridges and similar

Version: 1.5.27.0

Frequency: Consistently

Severity: High

Marketplace package name: if applicable

Context: In scenery editor and when package installed through community or marketplace

Similar MSFS 2020 issue: insert url here if applicable

Bug description:
Using terraforming on TIN elevated roads and bridges collapses the texture on itself and causes bad flickering and ugliness.
Using Exclude TIN does not fix this, but instead causes similar ugliness although with less flickering.
Example of sceneries this affects: Flightbeam’s KSFO when city update 10 is installed. (I am not associated with Flightbeam, this is just an example).

Repro steps:
1: Go to KSFO with city update 10 installed.
2: Find one of the major highway intersections around the airport perimeter.
3: Note that the road overpasses are well done TIN with proper bridge shape with open air under the bridge.
4: Create scenery project.
5: Create polygon or rectangle covering intersection
6: Enable terraforming.
7: Observe that road/overpass/bridge collapse down onto the surface and the road surface becomes very ugly and starts flickering.

Attachments:

Minimal scenery editor project for quicker verification:

ksfotest.zip (7.0 KB)

Private attachments: Send a PM to @PrivateContent with the link to this topic and the link to download your content

Hello @WombiiActual

We are tracking a similar issue internally, although there are no easy fix for this and I don’t expect us to come with a solution in the short term.

I’ll update this topic when we move forward on this.

Regards,
Sylvain

Thank you for letting me know.