diff --git a/server/tilerendererjob/initial.go b/server/tilerendererjob/initial.go
index ffec5a3..297a047 100644
--- a/server/tilerendererjob/initial.go
+++ b/server/tilerendererjob/initial.go
@@ -14,7 +14,6 @@ type InitialRenderEvent struct {
 
 func initialRender(ctx *app.App) {
 	logrus.Info("Starting initial rendering job")
-	lastMtime := ctx.Settings.GetInt64(settings.SETTING_LAST_MTIME, 0)
 
 	for true {
 		start := time.Now()
@@ -25,10 +24,6 @@ func initialRender(ctx *app.App) {
 			panic(err)
 		}
 
-		if result.LastMtime > lastMtime {
-			lastMtime = result.LastMtime
-		}
-
 		if len(result.List) == 0 && !result.HasMore {
 			ctx.Settings.SetBool(settings.SETTING_INITIAL_RUN, false)
 
@@ -62,7 +57,6 @@ func initialRender(ctx *app.App) {
 		}
 		logrus.WithFields(fields).Info("Initial rendering")
 
-		ctx.Settings.SetInt64(settings.SETTING_LAST_MTIME, lastMtime)
 
 		//tile gc
 		ctx.TileDB.GC()
diff --git a/server/tilerendererjob/job.go b/server/tilerendererjob/job.go
index 6c4e591..1d3a092 100644
--- a/server/tilerendererjob/job.go
+++ b/server/tilerendererjob/job.go
@@ -3,9 +3,16 @@ package tilerendererjob
 import (
 	"mapserver/app"
 	"mapserver/settings"
+	"time"
 )
 
 func Job(ctx *app.App) {
+	lastMtime := ctx.Settings.GetInt64(settings.SETTING_LAST_MTIME, 0)
+	if lastMtime == 0 {
+		//mark current time as last incremental render point
+		ctx.Settings.SetInt64(settings.SETTING_LAST_MTIME, time.Now().Unix())
+	}
+
 	if ctx.Settings.GetBool(settings.SETTING_INITIAL_RUN, true) {
 		initialRender(ctx)
 	}