Substance Painters UV viewport is 1X1 texturespace.

So when working with non square textures you need to stretch the UV to cover 1X1 space.

Due to this Painter works from a stretched UV and that will stretch the textures placed on it.

A good example on problems you can get is when your trying to add a checker pattern to a UV'd sleeve on a shirt, in a bent arm position. Its a complicated shape, with folds and with a bend in the middle. So not always possible to keep it orientated horizontal or vertical.

Because of this your not going to get the same clean checkerpattern all over the arm. It will be distorted, due to shape but also heavily distorted just because of the UV ratio.

Would be sooo golden if Substance support 1X2/2X1 ratio textures all the way. Viewport, generators and masks etc.

I'm working on a asset that has almost 40 udims. When I bake the utility maps needed for all those udims (some needing 8k) my file size increases to 20GB+ because all the maps are stored in the substance file.

I'd suggest an option in the preferences where one could choose a seperate location for those maps so every substance (and autosave) doesn't have to be so large.

This would save time on saves and autosaves (right now it's taking 3+ minutes on a 20+ GB file) and would also make me save the file more often, which reduces time and work lost when substances crashes.

I noticed that the workflow is much smoother when I segment parts of the model in advance to be their own unique layers.

Yet, I have no feature to combine the resulted PNG, because each area of the mesh itself still belongs to the same UV map.

I want an option that'll allow me to combine PNG'S, when they combine in this manner:
On each resulting image, the area external to the seen parts on the model are considered as "0", blank
And the areas seen on the model are considered as "1", filled with information.
When combining the PNG'S together, only the used parts will enter the final image... While everything ells (external information) will be ommited.

This will allow me to make a single PNG out of many different layers, and can make my workflow smoother.

Because each material brought outside of the software has it's own layer system, and you can hide parts you don't need to see at the moment.
It's a very useful function, and I want to work with it better.

If your hard drive fills up, autosave will get stuck causing all work to be lost. It should be aware when the hard drive where autosaves are located is too full and not attempt to autosave if there is not enough space, and warn the user that there is not enough space to save the autosave file.

Or be able to cancel an autosave that is in progress.

Also, a setting to limit the number of autosaves for a project.

Also, something to not autosave when nothing has changed in the project.

I can't believe this happens! The feature that is supposed to save your butt, will ruin your life if your hard drive is too full to complete the autosave! Please fix this somehow!

Please add ways to speed baking to best use high end computers with many cores Threadrippers/i9s and high ram. I upgraded from 4 cores to 24 and was a bit disappointed to find substance using only about 15% of my new horsepower. Yes the baking goes faster but it seems like it should be chugging harder/faster than it is. It would be good if there was a turbo mode that would blank the viewport and the feedback list (although i do love that feature) so that the baking can just go full out without doing any extraneous updating that could be skipped.

In the included image one can easily see the large discrepancy between the font size on the desktop and Substance Painter. The screen resolution is set to 3840 x 2160 and the desktop has been zoomed by 25%. It appears to me that either the underlying UI components are a bit dated or just do not consider the higher display resolutions that are available today. Even though I am using a 43" monitor I need to be no more than 12" away to be able to read anything. I should add that I am in my 60's so that has some bearing.

Please take the time to look into manual/dynamic resizing of the UI fonts and Icons.

Thanks!