Problem with Terrain Grassmap Generation

There seems to be a issue with 4.14’s transform for grass that is generated with grassmaps in the terrain shader. Only some grass around the map has a squashed look / looks like one axis is flattened. This is the same regardless of the model used. It happens in our projects on some bushes also.

This is obvious in various Marketplace Packs and Epic’s Open World Grass.

Switching back to 4.13.1 and this issue doesn’t occur. My guess it’s due to recent changes to the SceneComponent Engine class. Note that it doesn’t happen to manually painted grass, only grass maps in the terrain shader.

Hey Deathlyrage,

Thanks for the clear and precise repro steps. I was able to confirm what you are reporting and have gone ahead and entered a bug report for the issue. You can track the issue following the link below on our public issues tracker.


Once the issue has been addressed by our engineers either myself or another staff member will return with an update.

Let me know if you have further questions or need additional assistance.