diff --git a/SQCSim-common/chunk.cpp b/SQCSim-common/chunk.cpp
index 9fd6387..161775b 100644
--- a/SQCSim-common/chunk.cpp
+++ b/SQCSim-common/chunk.cpp
@@ -9,6 +9,10 @@ Chunk::Chunk(unsigned int x, unsigned int y, int64_t seed) : m_posX(x), m_posY(y
 	//if (input.fail()) {
 	OpenSimplexNoise::Noise simplex = OpenSimplexNoise::Noise(seed);
 	m_blocks.Reset(BTYPE_AIR);
+	int ratio = 0;
+
+	ratio = x * y % 7;
+
 
 	for (int ix = 0; ix < CHUNK_SIZE_X; ++ix) // Montagnes
 		for (int iz = 0; iz < CHUNK_SIZE_Z; ++iz) {
@@ -47,8 +51,8 @@ Chunk::Chunk(unsigned int x, unsigned int y, int64_t seed) : m_posX(x), m_posY(y
 			}
 		}
 
-	int rnd = rand() % 15;
-	if (rnd == 4)
+	//int rnd = rand() % 15;
+	if (ratio == 1)
 		for (int ix = 0; ix < CHUNK_SIZE_X; ++ix) // structure
 			for (int iz = 0; iz < CHUNK_SIZE_Z; ++iz) {
 				for (int iy = 0; iy < 14; ++iy) {
@@ -57,7 +61,7 @@ Chunk::Chunk(unsigned int x, unsigned int y, int64_t seed) : m_posX(x), m_posY(y
 							Structure(ix, iy, iz, 2);
 				}
 			}
-	if (rnd == 3)
+	if (ratio == 3)
 		for (int ix = 0; ix < CHUNK_SIZE_Z; ++ix) // structure
 			for (int iz = 0; iz < CHUNK_SIZE_X; ++iz) {
 				for (int iy = 0; iy < 14; ++iy) {
@@ -66,7 +70,7 @@ Chunk::Chunk(unsigned int x, unsigned int y, int64_t seed) : m_posX(x), m_posY(y
 							Structure(ix, iy, iz, 2);
 				}
 			}
-	if (rnd == 6)
+	if (ratio == 5)
 		for (int ix = 0; ix < CHUNK_SIZE_X; ++ix) // structure
 			for (int iz = 0; iz < CHUNK_SIZE_Z; ++iz) {
 				for (int iy = 0; iy < 14; ++iy) {