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marke53685031
Participating Frequently
March 9, 2022
Question

Adding an obj into an existing FBX, then updating the project inserts the new obj into EVERY layer

  • March 9, 2022
  • 1 reply
  • 738 views

I have an existing FBX (uses UDIM tiles) that's used in an existing Substance project. The project has many layers.

If I then add an obj (or obj's) to the FBX in my 3d program, then update the Substance project with the updated FBX  (obviously I retain strokes so I don't lose my previous layer work), the FBX updates the Substance project, no issues.


But here is the frustrating part: By default, Substance inserts the new obj (or obj's) into EVERY SINGLE layer in the Substance project!!  With large complex projects, 3d models do change, and its a HUGE time suck to have to go into the Substance Project every update and deselect these new objects from every single layer.

 

Is there a way to change this default behavior so that Substance DOES NOT add new objects to every layer when updating the FBX, while still preserving previous work done on existing objs/layers?   

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1 reply

Cedric Marchessoux
Community Manager
Cedric MarchessouxCommunity Manager
Community Manager
March 10, 2022

Hi 
You need in that case to have more than one Texture Set with UDIMs using the UV Tile workflow.

M
marke53685031Author
Participating Frequently
March 10, 2022

@Cedric Marchessoux  Huh!?... sorry but I completely don't understand what you mean. Could you restate please?

 

For reference, this is what I am doing:

I have a total of 100 objects in my 3d model (in Blender) spread across 2 collections.  They all share 1 material (as required by my end-use application).

 

I have exported the model as a 2-tiled UDIM (1 for each collection) as an FBX, then imported that into a Substance project. No problems there.

 

Then I go in and create as many texture layers for these 100 objects...  I have 40 layers at this time Yes, its a complex model.

 

As a next step, suppose I take one existing object in Blender and add a seam to create a new/additional UV island, (or add more mesh to one collection and create a new object UV) so that the total number of UV objects is now 101. 

 

And, if I then reimport the updated FBX with the 101 objects, that extra 1 object is added by Substance to every single of the 40 existing layers!!   How do I prevent any new objects added to the FBX to NOT be added to every single existing layer?  Thanks.

Cedric Marchessoux
Community Manager
Cedric MarchessouxCommunity Manager
Community Manager
March 11, 2022

Thanks for the description, it is now more clear.

One possibility once you have added the new piece of geometry isl: you create a group and put all your layers, then create a white mask and then use the polygon fill to exclude the new UV chuncks/Islands:

and then add a layer, create a black mask and select the chunk with polygon fill:

 

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