Unlit material now default?

ToreHolmem_AW — Thu, 05 Feb 2026 10:43:14 GMT

After upgrading to 2.2 all our integrated meshes that we stream in with the ArcGIS plugin to Unreal have unlit materials. Which breaks all our projects.

1 - Why. Why was this implemented, what is this trying to achieve

2 - How do we fix it

Re: Unlit material now default?

MichaelBranscomb — Fri, 06 Feb 2026 11:12:36 GMT

Hi Tore,

Sorry to hear you've found what appears to be a behavior change. Couple of questions:

Before updating to v2.2, were you using v2.1 (August 2025)?
Does this only affect ArcGISIntegratedMeshLayer or do you see this for other layers too?
Is the service you're using unlit?
Do you see this in the editor or only in packaged projects/apps?
Are you applying custom materials using the layer MaterialReference property?
Are your projects failing to build/run or do they run and it is a visual difference?
Can you provide a screenshot or video?
Can you share details of the source service (if we can access)?

Thanks

Mike

topic Unlit material now default? in ArcGIS Maps SDK for Unreal Engine Questions

Unlit material now default?

Re: Unlit material now default?