New issue with BasePart collisions

Bug Reports Engine Bugs
#1

Parts are falling through other parts when they shouldnt. This bug seems to be brand new(4PM EST 6/30/2023) to me

Bug reported by one of my players: tc3 moment - Clipped with Medal.tv

I replicated it with blocks in that exact map location. So I simplified the test further and opened a new baseplate file and put in a 0.8 thickness WedgePart and tried dropping 1x1x1 cubes and this happened every so often:

Test file:
BasePart collision.rbxl (41.8 KB)

This happens in play mode with me toggling into server mode(so the client and studio in one window)

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#2

Hey! Sorry for the problems. Can you switch your PhysicsSteppingMethod to Fixed?

#3

That fixes the issue, thank you!

With it being Default, this was the result with a clearer test:

#4

Awesome. I’ll take a closer look at your repro and see if we could improve out adaptive stepping system. Sorry for the issues!

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#5

Seems like the parts were being simulated at 60hz which is prone to tunnelling. We will make some changes to deal with this type of situtation :slight_smile: In the meantime, I recommend using Fixed if you are frequently simulating small/thin parts.

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#6

Thank you for the fast response! I’ve updated my game to Fixed

1 Like