update dragonfly

go.mod

@@ -6,7 +6,7 @@ go 1.19
 replace github.com/sandertv/gophertunnel => github.com/olebeck/gophertunnel v1.27.4-1
 
 //replace github.com/df-mc/dragonfly => ./dragonfly
-replace github.com/df-mc/dragonfly => github.com/olebeck/dragonfly v0.9.2-1
+replace github.com/df-mc/dragonfly => github.com/olebeck/dragonfly v0.9.3-1
 
 require (
 	github.com/cloudfoundry-attic/jibber_jabber v0.0.0-20151120183258-bcc4c8345a21

subcommands/world/chunk.go

@@ -50,6 +50,7 @@ func (w *WorldState) processLevelChunk(pk *packet.LevelChunk) {
 	for _, sub := range ch.Sub() {
 		if !sub.Empty() {
 			empty = false
+			break
 		}
 	}
 	if empty {

subcommands/world/chunk_render.go

@@ -20,6 +20,9 @@ func blockColorAt(c *chunk.Chunk, x uint8, y int16, z uint8) (blockColor color.R
 	} else {
 		b, found := world.BlockByRuntimeID(rid)
 		if found {
+			if d, ok := b.(block.LightDiffuser); ok && d.LightDiffusionLevel() == 0 && y > int16(c.Range().Min()) {
+				return blockColorAt(c, x, y-1, z)
+			}
 			if _, ok := b.(block.Water); ok {
 				y2 := c.HeightMap().At(x, z)
 				depth := y - y2