I’m trying to achieve something like if a mesh item has multi uv island, the packer should make sure all the uv islands are on the same poly island will be on the same udim tile.
But i don’t want to tell to the UVP3 that which poly island should get on which tile, UVP should sort that out to achieve the best uv cover, i just want to tell to UVP that i want all the uv islands are on the same poly island should get on the same tile section (and later to the same material)
UVP Grouping is not good, because it defines that which group should get on which tile section.
Hello. Use the Groups To Tiles mode for this use case. Watch this tutorial carefully:
And as a last step of the packing scenario configuration enable Pack To Single Box in the grouping scheme options - it does exactly what you requested.
Unfortunately group to udim tiles method is not the solution to my problem.
I try to explain it a bit more detailed.
Image that I have multi poly islands, and those poly islands had multi uv islands.
The only condition i want to tell to the packer is which uv islands should hold together.
But i don’t want to bother which item is getting on which udim tile.
I have only 2 priorities here overall:
1 - uv islands on the same poly island should stay on the same tile (i understand Groups making this)
2 - Pack all the uv islands the most efficient way to achieve the best uv cover per tile (and of course take attention to “rule 1” during the process), and of course keep the texel density (or if i set manually different texel density ratios the packer should consider that but i already know that ratio based scale stuff)
Now i can sort out uvs to tiles with constant texel density, but one poly island can contains multi material id (if poly island has multi uv islands) because packer is not considering the uv island to poly island relation.
As i can see Groups simply sorting out the groups to different udim tiles (and yes i see there are lot of options but none of them is covering the option i need above.
Please let me know if my explanation is still confusing
Next time please respond directly to my post, otherwise I won’t be notified about your message.
Not 100% sure what you mean by “poly island”. I guess you mean “mesh part” by that. If so, note there is the ‘Mesh part’ grouping method in UVPM. Use that grouping method.
Next set Texel Density Policy to Uniform. Set Group Layout Mode to Tile Grid. Set the dimensions of the gird you want.
In that Group Layout Mode the packer will pack groups to the same Tile Grid. Next enable Pack To Single Box.
Also enable Heuristic Search below the Packing Options subpanel.
