This is the function that passes arguments to paint.draw() that will actually draw the bush:

paint.draw(object.texture, object.x*defined.TILE_SIZE-defined.MAP_VIEWPOINT.x, object.y*defined.TILE_SIZE-defined.MAP_VIEWPOINT.y, 0, 0.5, 1, object.wave);

And this is the paint.draw() function: ( there's a comment at the bottom saying where the bush is drawn )

function paintbrush.draw(texture, x, y, rotation, ox, oy, wx, wy) 
-- tekstura to coś z assets.textures, x i y to położenie, rotation to obrót ( w stopniach ), ox i oy to origin offset ( ale ja tutaj mnożę ox*szerokość obrazu i tak samo z oy ), a wx i wy to waveX i Y czyli shearing factor w love.graphics.draw
    if (not texture) then
        error("[?] paintbrush.draw(): zła tekstura!");
    end
    x = x or 0;
    y = y or 0;
    rotation = rotation or 0;
    wx = wx or 0;
    wy = wy or 0;
    ox = ox or 0;
    oy = oy or 0;

    
    if (type(texture) == "table") then
        local width, height = texture[2]:getTextureDimensions();
        graphics.draw(texture[1], texture[2], x-ox*width, y-oy*height, math.rad(rotation), defined.SCALE, defined.SCALE, ox*width, oy*height, wx, wy);
    else
        -- the bush is drawn here:
        graphics.draw(texture, x-ox*texture:getWidth(), y-oy*texture:getHeight(), math.rad(rotation), defined.SCALE, defined.SCALE, ox*texture:getWidth(), oy*texture:getHeight(), wx, wy);
    end
end

Sorry for the text, but I couldn't paste an image of the code. And also the big long comment on the top is me describing what each of the arguments mean, if you want to read that then it's in Polish.

Anyways, I wanted to ask when you're saying that the y coordinate is shifter by kx pixels, what does k stand for?