Accessing a landscape component texture's raw data always returns null

Development Programming & Scripting
1

I’m trying to access the bulkdata in the heightmap of a landscape component, but trying to lock() the data always returns a null pointer.
I’ve checked and the bulkdata is available and unlocked, so I can’t seem to figure out why its not returning anything

Here’s my code:

for (auto& LandscapeComponent : Landscape->LandscapeComponents)
	{
		if (LandscapeComponent->HeightmapTexture)
		{
			FTexturePlatformData& PlatformData = *LandscapeComponent->HeightmapTexture->PlatformData;

			if (PlatformData.Mips.Num())
			{
				FTexture2DMipMap& MyMipMap = PlatformData.Mips[0];

				FColor* FormatedImageData = (FColor*)(MyMipMap.BulkData.Lock(LOCK_READ_ONLY));

				if (FormatedImageData)
				{
					for (int32 X = 0; X < LandscapeComponent->HeightmapTexture->GetSizeX(); X++)
					{
						for (int32 Y = 0; Y < LandscapeComponent->HeightmapTexture->GetSizeY(); Y++)
						{
							NewLandscapeHeightmap.GetRawXY(LandscapeComponent->SectionBaseX + X, LandscapeComponent->SectionBaseY + Y) = FormatedImageData[X + (Y * LandscapeComponent->HeightmapTexture->GetSizeX())].R;
						}
					}
				}
				else
				{
					GEngine->AddOnScreenDebugMessage(INDEX_NONE, 10.f, FColor::Red, FString("Unable to lock the platform data"));
				}

				MyMipMap.BulkData.Unlock();
			}
		}
	}

It always prints out “Unable to lock the platform data”

2

Try changing the properties of your texture-asset. I think the most important one is “Compression Settings → TC Vector Displacementmap”. Not sure if you also need to set sRGB to false and Mip Gen Settings to NoMipMaps.

3

Hi there, did you sort that out???

GetSize always gives me 512x512 althought the landscape is much larger. How do I access the complete landscape hightmap?