I forgot I already added an option for this

options.hpp

@@ -27,7 +27,6 @@
 #define A_VISVALINGAM ((int) 'v')
 #define A_GENERATE_POLYGON_LABEL_POINTS ((int) 'P')
 #define A_TRUNCATE_ZOOMS ((int) 't')
-#define A_STOP_EARLY ((int) 'x')
 
 #define P_SIMPLIFY ((int) 's')
 #define P_SIMPLIFY_LOW ((int) 'S')

tile.cpp

@@ -1522,7 +1522,7 @@ long long write_tile(decompressor *geoms, std::atomic<long long> *geompos_in, ch
 
 	int first_detail = detail, second_detail = detail - 1;
 	bool trying_to_stop_early = false;
-	if (additional[A_STOP_EARLY]) {
+	if (additional[A_TRUNCATE_ZOOMS]) {
 		// If we are trying to stop early, there is an extra first pass with full+extra detail,
 		// and which loops if everything doesn't fit rather than trying to drop or union features.
 		// XXX special case for points below basezoom