I just thinking how create all stacked icons for Krastorio 2, they are many, so I suppose that via code is possible create a function that simulate stacked object returing an icons table with icon shifted a bit copied three time over the same icon.
But I discover that public API interface call:
deadlock.add_stack(item_name, graphic_path, target_tech, icon_size, item_type, mipmap_levels)
use directly the icon_path, so is impossible pass an icons.
Is there a possibility of use icons in next updates?
I think that because graphic_path should be a string, if instead is a table, should be easy modify the standard function with an type check without change the old function behaviour.

Good point, the API needs an update for the new icon options. I'll see about working on this soon, thanks!

The current API if no graphics path is provided will generate a stacked icon itself using the default icon of the item it’s been asked to stack.

However with the release of 0.18 the in game icons have been replaced with mipmaps. 4 icons of different resolutions placed beside each other in one png file.

Yup - the devs have forced my hand, will be needing to add this in the initial 0.18 release.

FYi .. There are some fixes coming in 0.18.1 for loaders
- https://forums.factorio.com/viewtopic.php?f=30&t=80290
- https://forums.factorio.com/viewtopic.php?f=30&t=80265

OK, I suppose at this point that the answer is ignore do to this work and leave the work to ur mod setting graphic_path null in deadlock.add_stack(item_name, graphic_path, target_tech, icon_size, item_type, mipmap_levels)

Deadlock gave some sample code in the forum to make stacked icons. I used his code and made some python scripts

https://github.com/billbo99/deadlock_stacked_recipes/tree/master/python/make_stacked_icons.py
I place the icons in a folder called "raw_input" and run the script. For each icon it makes 42 different stacked icons in different layouts. Once I pick the icon that looks best I move the chosen file to "mips_input" and it creates me the icon in its 4 resolutions side by side in a mips file.

I can then tell deadlock to load the icons I have provided when creating some icons.

404

Another problem:
1.151 Script @deadlock-beltboxes-loaders/prototypes/shared.lua:17: DBL: Warning: creating layered stack icon (steel-gear-wheel), this is 4x more rendering effort than a custom icon!

https://github.com/billbo99/deadlock_stacked_recipes/blob/master/__python__/make_stacked_icons.py

The error message comes up as a warning .. Deadlock was told by a DEV once that icons with multiple layers placed on a belt could have a performance hit for people on low end graphics cards.

Thanks, I will try it