gradient from top to bottom

[Abilio5EC9]

Hello

Here I have several objects together in a single object that have the same material (same substance graphic) as in the image below.

I would like to know how I can make a gradient from bottom to top aligned on all objects?

I already tried with node: 3D linear gradient and everything got messed up.

thanks

[davescm]

Hi,
Bake a 'position' and 'world space normal' map from your model and use that, along with your linear gradient,  to drive a Tri Planar Grayscale (or Color) node. You can adjust the projection parameters as required.

Dave

[Abilio5EC9]

hey

and that ?

came out embarrassed.

Do you have any more suggestions?

thank you again

[davescm]

Not without seeing your model. Can you post it as fbx

Dave

[Abilio5EC9]

follow the model

thanks

[davescm]

First I had to fix the model unwrap, I tried importing it to Painter, as a test, and it failed to load due to UV islands being across the UDIM tile borders. I used Blender and scaled the islands on tile 1001 to keep them off the border and re-exported the model (now called DoorWoodamended)

Now I was able to bring the model into Substance Designer and Bake the tiled Position and World Position Normal maps.

After connecting these to a Tri-Planar grayscale node (as previously described) I right clicked in the graph empty space and chose Assign Substance Graph to 3D Mesh >  DoorWoodamended >Door>All

I can now use the UV Tile at the top to display each UV tile in turn (you cannot display them together in 3D view - that is a limitation of Substance Designer).

Dave

[Abilio5EC9]

HELLO

I took the test.
There was this dirt on the channel that I'm not using:

can it be corrected?

As for this other question:
can you help me ?

How can I, on this port, one object do: ambient occlusion on the other?

thank you again

[Abilio5EC9]

I managed to solve the first question:
does not work with IRAY .

you know why ?
Is it possible to fix it when using IRAY?

as for Ambient Occlusion shuffling.

you know why ?
do you know how to fix it?

thanks

[Abilio5EC9]

I solved the Ambient Occlusion problem using the same context that you taught me.

The only question left is:
I managed to solve the first question:
does not work with IRAY .

do you know why?
Is it possible to fix it when using IRAY?

Do you think that in these cases it is better to separate it into two objects?
How could I use the same graph for two objects, creating variations in the node configurations for each object in order to save processing?

thanks

[Abilio5EC9]

one more doubt :

How can I, on this port, one object do: ambient occlusion on the other?

thank you again