+1 to this. Would be super useful to draw icons/shapes and text to the map.

Yup. Just noticed it myself after copy-pasting the prototype definition of the vanilla cargo wagon over mine. Thank you all for the help!

line_length defaults to 0, which means one row. Hence the bigger than 8k issue. It wasn't actually bigger than 8k, it just thought it was.

I tried replacing the settings to match the vanilla cargo wagon's but it is still throwing the same error (max width 8192).

empty_flatbed_wagon.pictures =
{
layers =
{
{
priority = "very-low",
width = 222,
height = 205,
dice = 4,
direction_count = 128,
allow_low_quality_rotation = true ...

I tried changing the width and height to something really small, like 12, and that let me into the game with no errors. But when I placed down my modded wagon, it was invisible.

Interestingly, that did change my error.

1.397 Error AtlasSystem.cpp:1543: The given sprite rectangle (left_top=1024x0, right_bottom=1280x256) is outside the actual sprite size (left_top=0x0, right_bottom=1024x1024).
See the log file for more information.: __mod__/graphics/entity/empty-flatbed ...

The definition for the prototype (with comments removed) is as follows:

local empty_flatbed_wagon = util.table.deepcopy(data.raw["cargo-wagon"]["cargo-wagon"]);
empty_flatbed_wagon.name = "flatbed_wagon";
empty_flatbed_wagon.inventory_size = 0;
empty_flatbed_wagon.minable = { mining_time = 1 ...

Hello, I am out of ideas on how to get past this, so I have come here for help. My mod includes a bunch of sprite sheets, but no matter how I resize or recombine them, I always get this error on launch:

1.072 Error ModManager.cpp:1560: Error while loading entity prototype "flatbed_wagon" (cargo ...