new to toolbag - SP to Toolbag question about UDIMs

demonslayer

Hi fellas,
iam new to toolbag (just bought on the sale) and thought about importing my recent model into TB.The point is it consists of 20 Udims or "Texture Sets" - >means every Object has offsettet UVs.

What is the best way to import this in TB?
Do i have to set each UV back to 1/1 to get the textures to work at all, or is there anything like a tag to be used?(In vay you can use the <*.UDIM> tag to load multiple UVs.
I can hardly believe that i have to set up 20 sepearte shader for my scene then?

let me know

artstation danielbauer

EarthQuake

Toolbag does not support UDIM textures, so you will need to set up 20 material IDs in your 3D app, each with a unique material (one for each UDIM). You should not need to remap the UVs to 0-1 space, UVs outside of 0-1 should work fine.

demonslayer

I see, so i have to rethink my used workflow when aiming for the marmoset viewer.
As for now i even have problems stacking the correct converted textures from Subtance Painter into the TB shader (metall/rough) because i have meshes that dont share the same UV tiles.For example - the head/arms/legs of my char consist of 1 single mesh, but the UVs are placed on 2 UV Sets.(I wanted much UV space for the face/head).

About the IDs - iam not sure how you meant it.You suggest to built 20 shaders in 3ds max for example to then import the fbx with those into TB?
Maybe not a bad idea, i could ask the programmers in my company to write a script for 3ds max to built 20 shaders out of the udims.
So sad it does not support multi UVs.Its so easy to work with.

EarthQuake

Yeah you would need to create a shader/material in 3ds max for each UDIM, and have a unique texture set for each of those that you load into each material in Toolbag.

If your target is Viewer, I would suggest going with a more traditional video game style material setup where you have one or two unique texture sets/materials. 20 UDIMs, unless the resolution is real small, means a whole lot of texture memory, which will most likely perform very badly or outright crash on most devices.

demonslayer

thanks for the help on this topic, it worked out
https://www.artstation.com/artwork/qVnrn

wilson66

Baking with multiple texture sets only works for me in 3.05 when I put all UVs of all objects into 0-1 UV space (and assign separate materials to the objects I want to bake separately). If I don't, baking finishes very quickly and produces empty maps with just a single color each for all UDIMs outside 0-1 UV space.

Is this normal? I have done this before, and thought I layed out the UVs in UDIMs. This does not seem to work (anymore ?).

Did they change this in 3.05, is this a bug, or did it never work to lay out the UVs outside of 0-1 UV space?

EarthQuake

wilson66 said:

Baking with multiple texture sets only works for me in 3.05 when I put all UVs of all objects into 0-1 UV space (and assign separate materials to the objects I want to bake separately). If I don't, baking finishes very quickly and produces empty maps with just a single color each for all UDIMs outside 0-1 UV space.

Is this normal? I have done this before, and thought I layed out the UVs in UDIMs. This does not seem to work (anymore ?).

Did they change this in 3.05, is this a bug, or did it never work to lay out the UVs outside of 0-1 UV space?

This is normal and isn't new for 3.05. UVs outside of 0-1 will be ignored.

demonslayer

have to dig out own topic again as i hoped we can do this now.
my wish for 2019 - UDIM texture bakes
+ hidden objects wont cast shadows/invis for DOF picking
Have a great new year guys,

EarthQuake

demonslayer said:

have to dig out own topic again as i hoped we can do this now.
my wish for 2019 - UDIM texture bakes
+ hidden objects wont cast shadows/invis for DOF picking
Have a great new year guys,

You can bake UDIMs with the texture set feature, it requires a little extra work but it's feasible. What you need to do:
1. For each UDIM, give the low poly faces a new material, ie: 1001, 1002, 1003, etc
2. Make sure to move all UDIM uvs to the 0-1 UV space
3. Enable texture sets

There, now you'll be able to bake UDIMs as texture sets.

I don't understand the request about hidden objects, can you clarify that?