diff --git a/racing.h b/racing.h
index 0c90396..9220a65 100644
--- a/racing.h
+++ b/racing.h
@@ -176,7 +176,7 @@ TPE_Vec3 _LCR_racingBlockEnvFunc(TPE_Vec3 point, const uint8_t *block)
       TPE_Unit rampShift = block[0] != LCR_BLOCK_RAMP_CURVED ?
         LCR_PHYSICS_UNIT / 6 : 0;
 
-      sides[0] = LCR_PHYSICS_UNIT / 8 - rampShift;
+      sides[0] = -1 * LCR_PHYSICS_UNIT / 8 - rampShift;
       sides[1] = -1 * LCR_PHYSICS_UNIT / 4;
       sides[2] = LCR_PHYSICS_UNIT / 2 - rampShift;
       sides[3] = -1 * LCR_PHYSICS_UNIT / 4;
@@ -191,7 +191,7 @@ TPE_Vec3 _LCR_racingBlockEnvFunc(TPE_Vec3 point, const uint8_t *block)
       sides[2] = LCR_PHYSICS_UNIT / 2 - rampShift;
       sides[3] = -1 * LCR_PHYSICS_UNIT / 4;
       sides[4] = LCR_PHYSICS_UNIT / 2 - rampShift;
-      sides[5] = 0;
+      sides[5] = LCR_PHYSICS_UNIT / 8;
 
       _CHECK_NEXT(TPE_envAATriPrism(point,TPE_vec3(0,0,0),sides,LCR_PHYSICS_UNIT
         ,2));