Setting WorldGridMaterial to Unlit is causing a crash

Development Platform & Builds
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1

Setting WorldGridMaterial to Unlit is causing a crash

Steps to repeat:

  1. Open any project

  2. Go to Content Browser

  3. Enable “Show Engine Content”

  4. Find “World Grid Material” OR “Default Material”

  5. Open the material graph editor and in the Details panel, select Unlit instead of Default Lit.

  6. Click “Apply”

Expected: Material will compile successfully.

Result: Can’t compile the material, Unreal Engine is crashing.

Why do I need this: I need to reduce shader permutations to increase first-launch performance of the game.

2

Hey SalihBalkan,

Thanks for taking the time to write up this report. This is a known and reported issue, and you can follow the link I have provided below.

UE-42826

Once the issue has been addressed by our engineers the ticket will be updated and reflected in the public tracker. Let me know if you have further questions or need additional assistance.

Cheers,

3

Same thing happened to me. I make icons from the content browser thumbnails and wanted to have a flat material and when I try and change Unreal crashes. I have tried closing unreal and renaming the WorldGridMaterial and then copy the WorldGridMaterial_Low to WorldGridMaterial but when you open Unreal it crashes again.

Must have something to do with WorldGridMaterial being cached.

4

Same thing happened to me. I make icons from the content browser thumbnails and wanted to have a flat material and when I try and change Unreal crashes. I have tried closing unreal and renaming the WorldGridMaterial and then copy the WorldGridMaterial_Low to WorldGridMaterial but when you open Unreal it crashes again.

Must have something to do with WorldGridMaterial being cached. I am on 4.19, looks like there are looing at fixing this in 4.21