diff --git a/assets.h b/assets.h
index 70d3cda..576b6fe 100644
--- a/assets.h
+++ b/assets.h
@@ -47,6 +47,8 @@ LCR_MAP_BLOCK(LCR_BLOCK_CUBOID_FILL,10,2,1,0,0),
 LCR_MAP_BLOCK(LCR_BLOCK_LEFT,9,0,20,LCR_BLOCK_MATERIAL_CONCRETE,0),
 LCR_MAP_BLOCK(LCR_BLOCK_CUBOID_FILL,8,1,8,0,0),
 
+LCR_MAP_BLOCK(LCR_BLOCK_CORNER_12,3,1,5,0,0),
+
 /*
 LCR_MAP_BLOCK(LCR_BLOCK_FULL,15,0,0,LCR_BLOCK_MATERIAL_GRASS,0),
 LCR_MAP_BLOCK(LCR_BLOCK_CUBOID_FILL,10,1,15,0,0),
@@ -64,7 +66,6 @@ LCR_MAP_BLOCK(LCR_BLOCK_CUBOID_FILL,10,1,15,0,0),
 #define LCR_IMAGE_SIZE 64 ///< one-dimension resolution of bitmap image
 #define LCR_IMAGE_STORE_SIZE (LCR_IMAGE_SIZE * LCR_IMAGE_SIZE + 256 * 2)
 
-
 struct
 {
   uint16_t palette[256];
diff --git a/map.h b/map.h
index dee9985..2dae1cc 100644
--- a/map.h
+++ b/map.h
@@ -83,7 +83,9 @@
 #define LCR_BLOCK_RAMP_CURVED         0x09
 #define LCR_BLOCK_RAMP_CURVED_SHORT   0x0a
 #define LCR_BLOCK_RAMP_CURVED_WALL    0x0b
-#define LCR_BLOCK_RAMP_STEEP          0x0c
+#define LCR_BLOCK_RAMP_STEEP          0x0c ///< extremely steep ramp
+#define LCR_BLOCK_CORNER              0x0d ///< diagonal corner
+#define LCR_BLOCK_CORNER_12           0x0e ///< diagonal corner (1/2 wide)
 
 #define LCR_BLOCK_FULL_ACCEL          0x20
 #define LCR_BLOCK_FULL_FAN            0x30
@@ -600,6 +602,23 @@ void LCR_mapGetBlockShape(uint8_t blockType, uint8_t transform,
       break;
     }
 
+    case LCR_BLOCK_CORNER:
+    case LCR_BLOCK_CORNER_12:
+    {
+      uint8_t right = blockType == LCR_BLOCK_CORNER ? 6 : 3;
+
+      ADD(0,0,0)     ADD(right,0,6) ADD(right,4,6)   // front/right
+      ADD(0,0,0)     ADD(right,4,6) ADD(0,4,0)       // front/right
+      ADD(0,0,0)     ADD(0,4,6)     ADD(0,0,6)       // left
+      ADD(0,0,0)     ADD(0,4,0)     ADD(0,4,6)       // left
+      ADD(right,0,6) ADD(0,0,6)     ADD(0,4,6)       // back
+      ADD(0,4,6)     ADD(right,4,6) ADD(right,0,6)   // back
+      ADD(0,4,0)     ADD(right,4,6) ADD(0,4,6)       // top
+      ADD(0,0,6)     ADD(right,0,6) ADD(0,0,0)       // bottom
+
+      break;
+    }
+
     default: break;
   }
 
diff --git a/racing.h b/racing.h
index 16b353f..ac39674 100644
--- a/racing.h
+++ b/racing.h
@@ -154,6 +154,23 @@ TPE_Vec3 _LCR_racingBlockEnvFunc(TPE_Vec3 point, const uint8_t *block)
       break;
     }
 
+    case LCR_BLOCK_CORNER:
+    case LCR_BLOCK_CORNER_12:
+    {
+      TPE_Unit sides[6];
+      sides[0] = -1 * LCR_PHYSICS_UNIT / 2;
+      sides[1] = LCR_PHYSICS_UNIT / 2;
+      sides[2] = -1 * LCR_PHYSICS_UNIT / 2;
+      sides[3] = -1 * LCR_PHYSICS_UNIT / 2;
+      sides[4] = block[0] == LCR_BLOCK_CORNER ? LCR_PHYSICS_UNIT / 2 : 0;
+      sides[5] = LCR_PHYSICS_UNIT / 2;
+
+      point = TPE_envAATriPrism(point,TPE_vec3(0,0,0),sides,
+        LCR_PHYSICS_UNIT / 2,1);
+      
+      break;
+    }
+
     default:
       point = TPE_vec3(0,0,LCR_MAP_SIZE_BLOCKS * LCR_PHYSICS_UNIT);
       break;