Zoom level simplification

[saevioapps]

I am trying to add detailed roads to lower zoom level (8) but I don't know how to stop the simplification of features which seems to happen regardless of configuration.

Config file:

{
	"layers": {
        
		"transportation":    { "minzoom": 4,  "maxzoom": 12, "simplify_below": 1, "simplify_level": 0, "simplify_length": 0, "simplify_ratio": 1 }
	},
	"settings": {
		"minzoom": 0,
		"maxzoom": 8,
		"basezoom": 8,
		"include_ids": false,
		"combine_below": 14,
		"name": "Tilemaker to OpenMapTiles schema",
		"version": "3.0",
		"description": "Tile config based on OpenMapTiles schema",
		"compress": "gzip",
		"filemetadata": {
			"tilejson": "2.0.0", 
			"scheme": "xyz", 
			"type": "baselayer", 
			"format": "pbf", 
            "tiles": ["https://example.com/liechtenstein/{z}/{x}/{y}.pbf"]
		}
	}
}

Process file:

node_keys = { "highway","natural","place","waterway" }

-- Assign nodes to a layer, and set attributes, based on OSM tags
function node_function(node)
	
end


function way_function()
	local highway  = Find("highway")

	-- Roads
	if highway~="" then
		Layer("transportation", false)
		if highway=="unclassified" or highway=="residential" then highway="minor" end
		Attribute("class", highway)
	end

end

The roads look very simplified at zoom 8 even if I configured no simplification. How can i stop the simplification, or add more details to roads at level 8?

[systemed]

Vector tiles have a resolution of (typically) 4096 pixels across, so anything that you output will be snapped to pixel coordinates - you can't take a z8 tile and infinitely scale it up. What you're seeing appears to be consistent with the coordinates being snapped to the pixel grid.

If you apply a little simplification then it'll probably look better, due to the simplification algorithm smoothing out the "jaggies" that are caused by pixel scaling.