Unreal Engine drawing to much resources

Development Getting Started & Setup
1

Hi guys, i have unreal 5.4 im using for a Project.

My PC is:
CPU - AMD Ryzen 9 7900X3D 12 Core AM5 5.6GHz
Video Card - 8G (RTX 2070 SUPER)
RAM - 64G
HDD - SSD 4TB

When i go into Landscape mode in the Editor it seems to draw everything and lock up UE for up to 3 mins, i click a material (not open, just click it) and same locks up.
I have put the setting to the Lowest which is useless to work with but same.

Anyone know whats going on?

2

I need a bit more detail to understand what your actual problem is:

  • Can you tell me how much RAM is being used when the freeze occurs?
  • Are you using a heightmap for your landscape?
  • Do you experience performance issues even outside of Landscape mode?
3

with those specs everything asked is erelevant lol :face_with_hand_over_mouth: no way should 64gb of ram being used…

4

it is using 45G of Ram
and No nothing outside Unreal is an issue, fast as any other time.

5

If you’re loading 40 GB of data into your RAM, it’s normal for your computer to freeze.
The Landscape system in Unreal Engine is not well optimized, which is why even a small modification can take a long time—Unreal reprocesses every point on the landscape regardless of the size of the change.

However, there are several workarounds to improve performance:

  1. Lowering graphic settings won’t help.
    The key is to reduce the amount of data processed—either by lowering the number of points in your landscape or by reducing the data attached to those points (e.g., collisions, complex materials, high-resolution textures).
  2. Disable collisions while editing.
    Collisions are usually unnecessary during landscape editing. You can turn them off temporarily and re-enable them after you’re done.
  3. Remove or simplify your material.
    If you don’t need to see the material while sculpting, remove it to reduce resource usage—especially if it includes multiple layers.
    If you still want to see paint layers, duplicate the material and replace textures with flat colors. This keeps painting functional without overloading resources.
  4. Editor Preferences > Performance > Enable “Use less CPU when in background”
    While this won’t reduce loading times, it can improve responsiveness during editing.
  5. Disable real-time rendering (Alt + R)
    This saves performance while sculpting when live rendering isn’t necessary.
  6. Use World Partition.
    This system splits your landscape into manageable sections and only loads the areas you’re working on or are near. It’s highly effective for large environments.
  7. Reduce landscape resolution or components per section.
    For example, using 63x63 components instead of 127x127 significantly reduces memory usage and speeds up operations.

Keep in mind that the most significant performance boost will be to reduce the landscape resolution, but you can try all these options and see what fit the best for your case.

You got this :flexed_biceps: