How to import my mesh without it decimating

[sam_0987654321best]

So for whatever reason roblox studio decimates the hell out of my mesh when I import it and if anyone can help it would be great
(btw the mesh only has about 500 tris)

Mesh I'm trying to import

This is what happens when I import it

[SJxseCA]

Is your mesh solidified? I had this issue before, and the solution that simply had was to add a solidify modifier to the mesh, and just change the value to 0.001 or 0.01 to make it not noticeable.

EDIT: Also make sure that you’re not using a edgesplit modifier, as that can cause problems as well.

[sam_0987654321best]

it’s filled in on both sides

[SJxseCA]

Right, but you may have to make a solidify modifier. The mesh isn’t actually solidified, and Roblox could be reading the faces wrong. This was my issue a while back.

[sam_0987654321best]

what? your solution makes no sense all the solidify modifier does it just extrude the faces out and in order for a mesh to be solid, all the faces would be filled in

also the normals are all facing the correct way

I tested it out anyway but it didn’t work

[SJxseCA]

No, that is not all that solidify does. I’ve used solidify for plenty of uses and an issue like this is one of them. I’m just trying to help and provide a solution that works for me. Did you try and make the solidify as a negative so that it doesn’t show (since the normals are facing the correct way)??

[sam_0987654321best]

what?? that’s exactly what the solidify does it extrudes faces out and it just made my regular cylinder a hollow cylinder anyways I’m not trying to argue with you

I’m not sure if this is the reason but it may of been the mesh being too long or something with the scale rather than the actual mesh and roblox decided to decimate it

[SJxseCA]

@sam_0987654321best

that’s exactly what the solidify does it extrudes faces out and it just made my regular cylinder a hollow cylinder

That’s is what solidify does, you’re correct. But solidify can also be used as a solution to issues like this when rendering to Studio, as it has been for me.

What I used it for was a bit more complex than this, so that may be why it happened to work for me.

I’m not trying to argue with you either, I’m just saying that it has worked for me in the past and to not knock it down.

@sam_0987654321best

I’m not sure if this is the reason but it may of been the mesh being too long or something with the scale rather than the actual mesh and roblox decided to decimate it

And this could be a reason. Try making the mesh larger in Blender then importing. I
highly doubt that it would do anything but it is a possibility.

[Pokemoncraft5290 (Based)]

Have you tried triangulating the mesh before exporting?

[sam_0987654321best]

I already did that but it didn’t work

[sam_0987654321best]

nope, I think that actually might work I’ll try (it didn’t work)

[SJxseCA]

Alright, I just wanted to make sure that was tried. Didn’t try an argue, just wanted to make sure that it was known that it worked for me and make sure you didn’t try and knock it down until you tried it.

Maybe try and import 1 leg of it, and import it several times, adding one leg each, to see where it could be going wrong??

EDIT: Try adding an edge split modifier to it, the more that I think about it, that may help. From my experience, certain modifiers are good for resolving issues such as this when rendering into Roblox.

[powersaj (Powers)]

set the RenderFidelity to Precise, disables the decimation without having to add more tris.

[Aotrou (Shawn)]

@SJxseCA

PLEASE STOP SUGGESTING USING THE SOLIDIFY MODIFIER.

Why does my mesh seem to disappear at certain angles?

STOP SUGGESTING THE SOLIDIFY MODIFIER This is the worst thing you can do to solve this problem because you’re effectively ADDING 5 FACES FOR EVERY FACE, or in more technical terms, if the foliage sheet is comprised of a square (two tris), you’ll be added five additional squares (10 tris) because Solidify will turn it into a cube (six squares total, obviously). It’s also known as a destructive workflow because once you apply…

Mesh showing up in site but not in studio

Do Not Use The Solidify Modifier I know your problem has been solved but whenever I see someone using the Solidify Mod on anything I need to jump in and give the warning to not use it. It can double your tri count and make your game run incredibly slow, and fixing it would require you to reupload every mesh you used it on, which is a huge pain. Don’t use the Solidify mod to fix normal orientation because that’s not what it’s for. Blender has many tools to fl…

Why does my mesh have missing faces when I import it into roblox studio?

@480_s , can you confirm if you’ve triangulated your mesh before importing into Studio just like @WhyIsThereALengthLim suggested? Faces with a lot of vertices can be difficult for Studio to triangulate on its end, and will result in errors similar to what you have there. I go into more info in this post: Cup Mesh Importing With Holes - #11 by Aotrou @Naa_boom :rotating_light:DO NOT SUGGEST THE SOLIDIFY MODIFIER. It’s bad and breaks meshes.…

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Solidify Mod will not fix your inverted normals. If you have any meshes that appear to be fixed by Solidify, they’re actually very very broken. Solidify is only used for making solid geometry have additional interior geometry, like turning a solid sphere into a balloon.

It’s an incredibly destructive workflow that’s difficult to undo once applied, ruins game performance, and breaks meshes. Please go back through your replies and delete or edit out your incorrect suggestion to avoid confusion from other devs looking to get into Blender. This misinformation has spread long enough!!

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I also want to note that the Edge Split modifier is also really bad for performance, since it creates more verts and edges by literally splitting tris along any applicable edge. It’s easier to undo (merge by distance), but still not a great solution.

[SJxseCA]

My uses for Solidify have no change in performance, as the mesh was low in triangles. There are several different potential fixes to problems. Your best bet is to first try solidify as it can help identify the root cause.

@Aotrou

Solidify Mod will not fix your inverted normals .

Correct, we addressed this towards the top.

@Aotrou

It’s an incredibly destructive workflow that’s difficult to undo once applied, ruins game performance, and breaks meshes.

As far as this, this makes no sense. Yes, it has the potential to diminish game performance, but it does not break a mesh if used correctly.

@Aotrou

If you have any meshes that appear to be fixed by Solidify, they’re actually very very broken

As far as this, I’m not sure what you’re meaning by “broken.” All meshes that I’ve used this for have had a purpose for solidify. I believe you missed my point when I posted regarding this.

Thank you for posting regarding this, but I believe you may have missed my point with this.

Thanks for posting and clarifying for future developers.

[Aotrou (Shawn)]

@SJxseCA

and just change the value to 0.001 or 0.01 to make it not noticeable.

If you’re using the Solidify mod like this, you’re wrecking your game’s performance with every mesh you apply it to and will literally have to go back, fix, and reupload your meshes to fix it. That’s what I mean when I say “break your mesh.”

It’s also a destructive workflow because it’s a pain to reverse.

@SJxseCA

had a purpose for solidify.

Name these purposes. Show examples. If it’s used for anything other than just creating additional geometry to make objects have interiors, I almost guarantee there’s better, more performant methods.

[SJxseCA]

@Aotrou

Name these purposes.

I must look through my files and send a photo of it, however, I use this method for things such as cups, satellites (hard to explain), and anything that is open at one end and closed at another. Let’s finish this in DMs because I genuinely would like to know of any other methods for future reference.