improve chunk section palette handling for blocks

level/anvil/chunk.go

@@ -44,11 +44,17 @@ func (c Chunk) ToStorage(version string) (toChunk *level.Chunk, err error) {
 			}
 			toChunk.Sections[i].BlockCount = int16(level.BlocksPerChunkSection - level.CountStorage(toChunk.Sections[i].Blocks, 0))
 		} else {
-			toChunk.Sections[i].Blocks, err = f.FullWith(0) //TODO PALLETE index 0 if avial
+			var fillerId = int32(0)
+			if len(pallete) == 1 {
+				fillerId = pallete[0]
+				if fillerId != 0 {
+					toChunk.Sections[i].BlockCount = level.BlocksPerChunkSection
+				}
+			}
+			toChunk.Sections[i].Blocks, err = f.FullWith(fillerId)
 			if err != nil {
 				return
 			}
-			toChunk.Sections[i].BlockCount = 0
 		}
 	}
 	f = level.MakeBiomeFormat(version)
@@ -78,7 +84,7 @@ func (c Chunk) ToStorage(version string) (toChunk *level.Chunk, err error) {
 			if len(pallete) == 1 {
 				fillerId = pallete[0]
 			}
-			toChunk.Sections[i].Biomes, err = f.FullWith(fillerId) //TODO PALLETE index 0 if avial
+			toChunk.Sections[i].Biomes, err = f.FullWith(fillerId)
 			if err != nil {
 				return
 			}

tools/serve_world/main.go

@@ -113,9 +113,9 @@ func Limbo(c *proto.Conn) (err error) {
 	}
 	err = s.Send(&v1_21_8.PlayToClientPacketPosition{
 		TeleportId: 0,
-		X:          0,
+		X:          0.5,
 		Y:          100,
-		Z:          0,
+		Z:          0.5,
 		Dx:         0,
 		Dy:         0,
 		Dz:         0,