So I finally found out why I was still seeing errors in the log for your width and height calcs. It boils down to pathed_data["line_length"] is sometimes 0 and you don't get a correct width calc and the height created a divide by zero which created an erroneous "true" result in the the if statement creating the log entry. So below is the corrected with and height calcs which account for a line_length of 0. You should replace this code in all of your mods.

I was seeing the errors on the gun-turret and laser-turret graphics files.

edited: to erroneous "true" result. I typed that incorrectly thankfully the code was still correct. :)

    -- find width of animations
    if type(pathed_data["width"]) == "number" and type(pathed_data["line_length"]) == "number" then
        -- If pathed_data["line_length"] is > 0 do the operation normally. If is is zero then multiply pathed_data["frame_count"] and pathed_data["width"] to get correct number for with calc.
        local width = pathed_data["line_length"] > 0 and pathed_data["line_length"] * pathed_data["width"] or pathed_data["frame_count"] * pathed_data["width"]
        -- Separate upscaling calc to make it easier to read above calc. 
        width = math.max(math.floor(width * settings["upscale"]), 1)
        if width > 8192 then
            log("[ERROR]: Image @ " .. new_path .. " is wider than 8192 px (maximum)! It can't be loaded into the game!")
            return
        end
    end
    -- find height of animations
    if type(pathed_data["height"]) == "number" and type(pathed_data["line_length"]) == "number" then
        -- If pathed_data["line_length"] is > 0 do the operation normally. If is is zero then substitute pathed_data["direction_count"] to get correct number for hight calc.
        local height = pathed_data["line_length"] > 0 and math.ceil((pathed_data["frame_count"] or 1) / pathed_data["line_length"]) or pathed_data["direction_count"]
        -- Separate pathed_data["height"] calc and upscaling calc to make it easier to read above calc. 
        height = math.max(math.floor(height * pathed_data["height"] * settings["upscale"]), 1)
        if height > 8192 then
            log("[ERROR]: Image @ " .. new_path .. " is taller than 8192 px (maximum)! It can't be loaded into the game!")
            return
        end
    end

First of all, thank you very much for this bug report and the detailed solution.
I will test it and then implement it in all mods.

Feel free to hit me up if you run into any edge cases or have an issue.

Thanks, everything seems to be working, I'm currently doing a few other bugfixes and improvements. After that I will update all mods.

No problem happy to help, I actually had fun tracking that down!

I almost forgot. For your protection. I freely grant you a permanent non-revocable license to my code modifications above. I would appreciate a mention in the changelog. :)

I try to always do this after watching the minecraft bucket server fiasco that nearly completely killed that project after someone claimed copyright on the code they contributed freely. It is a crappy thing to do to a community.

Thank you for this hint and the permission to use the code. I will gladly mention you in the changelog.