What is causing this shadow artifact?

Now, I’m not exactly sure what is causing this weird shadow to appear inside of this area, I’ve highlighted the weird dark spots that annoy me.

If there is any way to fix this, or prevent this from happening altogether please inform me it’s been bugging me for months.
image

you’re gonna have to show more than just the inside. Is there any parts on the outside?
sometimes roblox has some buggy artifacting so dont stress it that much.
theres something about turning off global shadows and turning on cast shadows in some lighting thread somewhere but i cant remember it.

This also occasionally happens on some old projects of mine as well, I’ve had to switch games because I don’t like the look of it.

you’re probably gonna have to change your lightingtype in lighting tab, shadowmap to future / voxel. it changes how shadows are rendered, unless youre not really bothered by that

Are these Meshparts and if so do you have the collision fidelity to Box?