I want to add Factory Building Mk4 to the game by editing the mod.

While the Factory Building is different.

How would I be able to do that in the easiest way?

In layout.lua you'll find a layout definition of the three factory building types. You'll need to write another layout definition for the fourth type, define all the necessary entity prototypes for that layout definition, add a recipe crafting the factory building item and a technology unlocking the recipe, then go through the code, find hardcoded references to the existing three types of factory building and update them adding the fourth type.

Well, I'm struggling to understand what you are saying and I have very limited skills in programming.

Could you perhaps explain in more detail and specify each file and line of code but simpler if possible?

interesting... I took a quick stab at defining an mk4 layout:
https://gist.github.com/scriptslol/6847e638dc2d8048bc50ef48badb3ecc

I studied the differences between mk1, 2 and 3 to determine what an mk4 layout might look like. A lot of the points (such as connections) have stubbed values since I haven't really spent time to visualize things in my head ^_^

GitHub has a repo search feature. You can use it to look up things like "factory-floor-3" - this would clue you into where/what you would need to change to setup "factory-floor-4"

From what I can tell; defining a new factory can be tedious but the author did a great job with implementation so its just a matter of studying what's there and extrapolating your additions :)

Clean mod, well done.

I'm sorry for the late response, BUT I got this error. I think I am making progress, however, I do need help.


Failed to load mods: Path Factorissimo2__/graphics/component/pipe-connection-south.png does not match any enabled mod: Factorissimo2/graphics/component/pipe-connection-south.png

I assume you changed the mod name? You'll also have to change the references to that name in the prototypes

Wait, I gave an incomplete error message.
here is screenshot with the complete error message
https://prnt.sc/XRrXqJIVu9DC

I don't know what name to change things in prototype directory to.