# UE 5.3 crashing when trying to import a 16K heightmap **URL:** \ **Category:** World Creation\ **Tags:** unreal-engine, crash, Landscape, editor, heightmap, question\ **Created:** [October 18, 2023, 1:24am UTC](https://forums.unrealengine.com/t/ue-5-3-crashing-when-trying-to-import-a-16k-heightmap/1336189 "2023-10-18T01:24:15Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Knuthnads](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Knuthnads](https://forums.unrealengine.com/u/Knuthnads)\ **Post date:** [October 18, 2023, 1:24am UTC](https://forums.unrealengine.com/t/ue-5-3-crashing-when-trying-to-import-a-16k-heightmap/1336189/1 "2023-10-18T01:24:15Z")
Has anyone had any luck importing 16K heightmaps yet (16384 x 16384)? I have a 16-bit 16K heightmap in .png format that I’m trying to import in Landscape Mode, however the editor is crashing. Here’s the crash log produced: > LoginId:- > EpicAccountId:- > > Assertion failed: TextureDesc.Extent.X \<= (int32)GetMax2DTextureDimension() [File:D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Texture.cpp] [Line: 487] > > UnrealEditor\_D3D12RHI > UnrealEditor\_D3D12RHI > UnrealEditor\_Engine > UnrealEditor\_Engine > UnrealEditor\_RenderCore > UnrealEditor\_Engine > UnrealEditor\_Engine > UnrealEditor\_Engine > UnrealEditor\_Core > UnrealEditor\_Core > UnrealEditor\_RenderCore > UnrealEditor\_RenderCore > UnrealEditor\_Core > UnrealEditor\_Core > kernel32 > ntdll I know World Partition is supposed to support up to 16384 x 16384 landscapes, but I’m guessing Unreal does not actually support importing heightmaps larger than 8K? The import settings for the 16K heightmap were as follows: | | 16K Single Heightmap | | --- | --- | | | Heightmap Resolution: 16384 x 16384 | | | Section Size: 127 x 127 Quads | | | Sections Per Component: 1 x 1 | | | Number of Components: 129 x 192 | | | Overall Resolution 16384 x 16384 | | | Total Components: 16641 | I can import the heightmap if I split the 16K heightmap up into four 8K tiles, however I end up with seams between each tile: ![tile_seam](https://d3kjluh73b9h9o.cloudfront.net/original/4X/9/d/4/9d4063916891eb945219374c9ab8334720c33d10.jpeg) The import settings for the 8K heightmap tiles were as follows: | | 8K Heightmap Tiles | | --- | --- | | | Heightmap Resolution: 8192 x 8192 | | | Section Size: 255 x 255 Quads | | | Sections Per Component: 2 x 2 | | | Number of Components: 16 x 16 | | | Overall Resolution 8161 x 8161 | | | Total Components: 256 | I assume this is happening because each tile is being resampled down from 8192 x 8192 to 8161 x 8161? How exactly then do I import a 16K heightmap? ---
**Author:** ![FrostyJas](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/frostyjas/32/1194640_2.png) [@FrostyJas](https://forums.unrealengine.com/u/FrostyJas)\ **Post date:** [October 18, 2023, 4:38am UTC](https://forums.unrealengine.com/t/ue-5-3-crashing-when-trying-to-import-a-16k-heightmap/1336189/2 "2023-10-18T04:38:25Z")
Greetings @Knuthnads In regards to the error that you’re getting and the importing of the larger heightmap, I’d recommend reading a reply on a similar thread [here](https://forums.unrealengine.com/t/assertion-failed-texturedesc-extent-x-int32-getmax2dtexturedimension/752484/2). I hope this helps answer the question! ---
**Author:** ![Knuthnads](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Knuthnads](https://forums.unrealengine.com/u/Knuthnads)\ **Post date:** [October 18, 2023, 11:40pm UTC](https://forums.unrealengine.com/t/ue-5-3-crashing-when-trying-to-import-a-16k-heightmap/1336189/3 "2023-10-18T23:40:35Z")
Umm, sorry if I missed something here, but I’m trying to **import a heightmap** into Unreal Engine, not render out a sequence. I can see that the error is the same, however enabling the ‘High Resolution’ setting in the Movie Render Queue has no bearing on importing a heightmap. Okay so if the problem is the fact that a 16K texture exceeds my GPU’s maximum texture size, I would still like some guidance on how to import the tiled 8K heightmaps without these seams appearing. ---
**Author:** ![Knuthnads](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Knuthnads](https://forums.unrealengine.com/u/Knuthnads)\ **Post date:** [October 20, 2023, 1:35am UTC](https://forums.unrealengine.com/t/ue-5-3-crashing-when-trying-to-import-a-16k-heightmap/1336189/4 "2023-10-20T01:35:12Z")
I did some more testing. 1. Reduced the image size of the 8K tiles from 8192 x 8192 down to 8161 x 8161 in Photoshop. There’s still a seam. 2. Generated 4K tiles out of Gaea at a resolution of 4033 x 4033 per tile. There’s still a seam. 3. Tried importing these heightmap tiles in UE 4.7, 5.2 and 5.3. I’m seeing the same problem in each version. I don’t understand what’s happening to the heightmaps in Unreal to produce this offset along the edges. Edit: I should clarify that I’m importing the heightmap tiles **one by one** individually. If I choose to import all detected heightmap tiles automatically UE simply crashes either with an ‘Out of Memory’ error or with no error at all. And no, the World Partition minimap window is not open.