3 ms·

As someone who dabbles in 3d modeling, this is going to be an incredible resource for creating static 3d objects. Someone ought to come up with a way to convert

As someone who dabbles in 3d modeling, this is going to be an incredible resource for creating static 3d objects. Someone ought to come up with a way to convert to mesh better than the Marching Cubes algorithm I've seen applied to most NERFs. The models still lack coherent topology and would probably be janky if fully rigged.

boppo1 4y ago
I swear I recently saw something related to generating clean topology procedurally. Wish I could remember where.
poolio 4y ago
With smooth enough geometry converting NeRFs to meshes with marching cubes works pretty well. Would you say the topology of meshes on our website are still too incoherent for rigging?
- hjaarnio 4y ago
  In case of a communication gap; The word 'topology' has a more domain specific meaning in animation and rigging compared to the mathematical one. It's used to mean that the placement of the lower level components - vertices, edges and faces - are well aligned to the higher level structure of the object, and make up a well defined 2D grid that flows along the models surface. In particular you'd want edges going along/perpendicular to mesh structures such as limbs, and around facial features and other details in a logical manner. Otherwise when applying deformations as part of an animation the model will not have the detail in the right places to still look good, e.g. if there is no edges perpendicular to a joint in a limb, the bent version of the limb cannot have a clear smooth line along the joint, and the edges and faces become janky. Under this definition, marching cubes cannot produce good 2D topology, as the mesh features are all aligned to the cardinal grid instead of the features of the object represented.
  - poolio 4y ago
    Aha thank you, this is helpful. Agreed there is much research needed to get this working but hopefully not too far off: https://twitter.com/kkpatain/status/1575758085821706240 https://twitter.com/kkpatain/status/1575758085821706240

boppo1 4y ago

I swear I recently saw something related to generating clean topology procedurally. Wish I could remember where.

poolio 4y ago

With smooth enough geometry converting NeRFs to meshes with marching cubes works pretty well. Would you say the topology of meshes on our website are still too incoherent for rigging?

hjaarnio 4y ago
In case of a communication gap; The word 'topology' has a more domain specific meaning in animation and rigging compared to the mathematical one. It's used to mean that the placement of the lower level components - vertices, edges and faces - are well aligned to the higher level structure of the object, and make up a well defined 2D grid that flows along the models surface. In particular you'd want edges going along/perpendicular to mesh structures such as limbs, and around facial features and other details in a logical manner. Otherwise when applying deformations as part of an animation the model will not have the detail in the right places to still look good, e.g. if there is no edges perpendicular to a joint in a limb, the bent version of the limb cannot have a clear smooth line along the joint, and the edges and faces become janky. Under this definition, marching cubes cannot produce good 2D topology, as the mesh features are all aligned to the cardinal grid instead of the features of the object represented.
- poolio 4y ago
  Aha thank you, this is helpful. Agreed there is much research needed to get this working but hopefully not too far off: https://twitter.com/kkpatain/status/1575758085821706240 https://twitter.com/kkpatain/status/1575758085821706240