I'll tell you my process for making collisions work
First, I import the model into rhino 7 and click this box
Then, I go to boolean and click union
then, I lock some points on the mesh and use the reduce feature to make it as small as possible without the mesh being wildly deformed
then I export it from rhino and load it into netfabb
(I pirated both these programs lol)
I make sure "Stich all" and "automatic part repair" is checked
oh, and when I export the mesh from rhino I check the setting for "welded"
then I run a boolean in netfabb
usually, I would export the model after this
but sometimes, I'll try using netfabb to create a shell instead, usually I don't do the shell, but sometimes I'll try it
after this, the model is formatted weird, and doesn't like being imported into the game
so I throw the model into vectary , and directly export it, which seems to format the model properly so that my tool accepts it : https://app.vectary.com/p/?studio=true
I also use the "split connected components" feature in meshlab to check my work
if I click this and the mesh is split into a bunch of pieces, then I know it won't work in the game
I just try a combination of all these different features and settings until I get a mesh that works lol
my final mesh for the tree looked like this
nice and simple, 135 verts & 266 faces
the original tree mesh had 1470 verts & 2116 faces
when you import the original tree mesh, it doesn't work at all, no collisions
the mesh I made for collisions works pretty much perfectly
First, I import the model into rhino 7 and click this box
Then, I go to boolean and click union
then, I lock some points on the mesh and use the reduce feature to make it as small as possible without the mesh being wildly deformed
then I export it from rhino and load it into netfabb
(I pirated both these programs lol)
I make sure "Stich all" and "automatic part repair" is checked
oh, and when I export the mesh from rhino I check the setting for "welded"
then I run a boolean in netfabb
usually, I would export the model after this
but sometimes, I'll try using netfabb to create a shell instead, usually I don't do the shell, but sometimes I'll try it
after this, the model is formatted weird, and doesn't like being imported into the game
so I throw the model into vectary , and directly export it, which seems to format the model properly so that my tool accepts it : https://app.vectary.com/p/?studio=true
I also use the "split connected components" feature in meshlab to check my work
if I click this and the mesh is split into a bunch of pieces, then I know it won't work in the game
I just try a combination of all these different features and settings until I get a mesh that works lol
my final mesh for the tree looked like this
nice and simple, 135 verts & 266 faces
the original tree mesh had 1470 verts & 2116 faces
when you import the original tree mesh, it doesn't work at all, no collisions
the mesh I made for collisions works pretty much perfectly