Shell Padding Not Being Applied Properly with Low Area Usage

[michael.easter]

I'm having issues with the shell padding of my models when the shells I'm laying out use a small portion of the whole UV map. In the image below you can see I created a cube, cut all the seams, set the texel density of the shells to 20px/unit on a 4k map and laid out the UVs using the settings shown. Those settings include no scaling, and a shell padding of 5 px. When I measure the distance between two of the shells, the padding is actually 1.18 in this case.

Has anyone else encountered this issue? Anyone have a solution?

Maya Version 2024.0, although I believe the issue has been present for longer...

[dmptablet]

Hello, I`m having the same issue. Did you fix it? 

[mabioca]

This is because you scaled down the UVs and then turned off the Scale Mode option in the Layout Settings. To resolve this problem in your example, since the Layout command works proportionally, entering a value of 5 in the Packing Region will make the distance between the two UVs nearly equal to the Shell Padding value.

[michael.easter]

I appreciate the response, I have all but given up on this. My understanding (and prior use) is that the packing region is for packing a partial UV map, or packing over multiple dims. I think this might just be a coincidence you're demonstrating here, have you tried with other UVs or shell padding values?