I like this idea! I think it could really expand how much detail creators can put into their games!
Good Update Roblox! I think now the builders are much happy! Thanks!
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Sweet!
Is there any reason why we canāt just have a single collision plane? Just a 2D plane with collision top/bottom?
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Try out our other recently added feature if youāre going to be working with a lot of small parts: 
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Roblox collision detection is discrete. Parts will change position each step, and if it penetrates something, it moves back out. If moving fast enough, and the part it comes into contact is thin enough, the first step could be on one side of the part, and the next step could be on the other side. No collision detected. This is referred to as tunneling. Itās one disadvantage of discrete collision detection, and itās what keeps us from letting collision geometry go below 0.05.
In contrast, continuous collision detection calculates if a collision will occur before it happens. No tunneling. Roblox doesnāt have this, yet.
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Cool feature! I shrunk down one of my gameās islands down to a ~30x20 stud area (the regular size is ~1500x1000 stud area). Downside is that it crashed my pc a few times trying to get it that small as well as trying to delete itā¦
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Could you DM me this model so I can try and repro the crash?
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It can be very useful for harder tightrope in obbies
Like 0.01 studs tightrope in terrifying or 0.001 stud in Horrible difficulty
The issue isnāt it being small, the entire island is at least 7000 parts/meshes so itās going to crash regardless.
can I try and see if I can fix it anyways?
The walls would be very odd if people made its size .001 .
Black holes never hurt anyoneā¦ and you canāt prove that otherwise
I say greenlight it.
cool update though, thx roblox staff
Do keep in mind the currently the physics will stop at .05 as per the post, temporarily until there is a fix.
But 0 studs is nothing so it would be no block all togetherā¦ 
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Glad to see that I can do this now without using meshes. One of my biggest current projects is a 1:2250 scale model map, and Iām constantly working with parts that need to be under 0.05 studs.
Considering one stud on my map is 630 meters, I can now finally recreate things a meter wide without having to do anything hacky. Thanks, Roblox!
The move grid gets set to 0.01, but the part size limit remains as 0.05 for me, beta feature is on, am I missing a step?
Yeah let the guy give it a shot.
Is this going to have any effect on floating point error, especially for the resize tool, because Iām worried that there will be a bit of randomness and chaos when Iām trying to do this, especially for ultra microscopic high precision builds that might be possible after this
Another possibility I can see is that a microscopic building might be possible with microscopic characters, but the movement will have to be custom-made. Also, Iām worried about camera issues, because if such a game is made where there is a room thatās microscopic and the characters are microscopic, Iām worried can the camera handle it well, or will things start breaking
Indeed, this doesnāt give you any extra precision overall, youāre still working with the same floating point sizes and locations as before. This just reduces arbitrary limits that randomly got in the way in edge cases before.
You still have to be aware of floating point error and work with it in mind (avoiding stacking super thin parts that would cause z-fighting, keeping your stuff from getting too far from the origin, etc) to get the maximum possible fidelity out of your creations.
1 Like