CustomPhysicalProperties Broken w/ A-Chassis Constraints

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1

[ :warning:Please disregard until this post is moved to #bug-reports ]

Around 2-3 hours ago, Roblox silently released a physics update that breaks the use of CustomPhysicalProperties and the massless property for BaseParts when combined with the use of Physical Constraints (Prismatic/Hinge/etc). Our games have also experienced instances of vehicles flinging into the air upon joining the game due to mass incompatibility/altercations. Note that yesterday none of this was happening and everything was running smoothly. Below are listed videos of the problem:


*In this example above, I would NORMALLY be able to pick up the bin with the robotic arm just fine. Now, the container is too heavy.


*In the example above, the trucks randomly decide to fling themselves into the air. NORMALLY this didn’t happen, and everything was working perfectly yesterday.

PLEASE look into this, thanks!

3 Likes
2

Yup, they broke A chassis, same happened with my cars

2 Likes
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Glad to see I’m not the only one experiencing this.

4

Here’s the fix bro

Go into the initialize script and change all the:

PhysicalProperties.new(
				0,

to

PhysicalProperties.new(
				0.01,

then go to A-Chassis Tune script and change CustomSuspensionDensity to 0.01

After this it will work like before

5

I think they fixed it. Everything seems to be working as of now…I didn’t modify anything and the behaviors are back to normal. Hopefully it stays this way.