FIX Physics Objects Clipping Through the Floor in Unreal Engine | SUBSTEPPING
Are your physics objects randomly falling through the floor or walls in Unreal Engine? 🤔
Don’t worry — in this video, I’ll show you the exact reason why this happens and how to fix it once and for all!
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We’ll start with a simple experiment showing how an object can either bounce off the floor or clip right through it, especially at higher speeds or when dealing with very small meshes.
Then I’ll explain in detail the technical reason: Unreal Engine calculates physics in discrete steps (frames), and at high speeds the object may “skip” collision checks, causing it to pass through.
Next, I’ll walk you through the practical solutions:
✔️ Make sure the object has a proper collision mesh that’s not too small.
✔️ Set a reasonable Mass value (around 1000 works well).
✔️ Enable Continuous Collision Detection (CCD).
✔️ And most importantly: enable Substepping in Project Settings to increase collision accuracy.
I’ll also explain the best Substepping values to balance performance and physics precision, and why you shouldn’t overdo it.
Finally, you’ll see test results after applying these fixes — no more random clipping through the floor!
If you find this video helpful, don’t forget to like 👍 and subscribe 🔔 for more Unreal Engine tips and tutorials!
00:00 OVERVIEW
00:26 intro
01:08 Why that happen
03:20 Solution
04:15 SUBSTEPPING
05:42 outro
Unreal Engine physics
Collision Substepping
Unreal Engine physics
Unreal Engine collision
Physics objects falling through floor
Unreal Engine bug fix
Substepping Unreal Engine
Continuous Collision Detection
Unreal Engine tutorial
UE5 physics
Physics simulation fix
Unreal Engine beginners
Fix clipping objects
Unreal Engine tips
Physics collision problems
Unreal Engine settings
Game physics tutorial
Unreal Engine CCD
UE5 collision issues
Unreal Engine floor bug
Physics accuracy Unreal Engine
Unreal Engine performance vs physics