diff --git a/src/main/kotlin/mods/betterfoliage/client/render/ModelColumn.kt b/src/main/kotlin/mods/betterfoliage/client/render/ModelColumn.kt
index 7ff2bdc..d971791 100644
--- a/src/main/kotlin/mods/betterfoliage/client/render/ModelColumn.kt
+++ b/src/main/kotlin/mods/betterfoliage/client/render/ModelColumn.kt
@@ -6,6 +6,7 @@ import mods.octarinecore.client.render.*
 import mods.octarinecore.common.Double3
 import mods.octarinecore.exchange
 import net.minecraft.util.EnumFacing.*
+import org.lwjgl.opengl.GL11
 
 /** Weight of the same-side AO values on the outer edges of the 45deg chamfered column faces. */
 const val chamferAffinity = 0.9f
@@ -13,6 +14,9 @@ const val chamferAffinity = 0.9f
 /** Amount to shrink column extension bits to stop Z-fighting. */
 val zProtectionScale: Double3 get() = Double3(Config.roundLogs.zProtection, 1.0, Config.roundLogs.zProtection)
 
+/** nVidia does it different... */
+val nVidia = GL11.glGetString(GL11.GL_VENDOR).toLowerCase().contains("nvidia")
+
 fun Model.columnSide(radius: Double, yBottom: Double, yTop: Double, transform: (Quad) -> Quad = { it }) {
     val halfRadius = radius * 0.5
     listOf(
@@ -92,12 +96,14 @@ fun Model.columnLid(radius: Double, transform: (Quad)->Quad = { it }) {
                  1 -> EdgeInterpolateFallback(UP, SOUTH, 0.0)
                  else -> vertex.aoShader
              })}
+             .cycleVertices(if (nVidia) 0 else 1)
     val q2 = Quad(v1, v4, v5, v6).setAoShader(faceOrientedAuto(overrideFace = UP, corner = cornerAo(Axis.Y)))
              .transformVI { vertex, idx -> vertex.copy(aoShader = when(idx) {
                  0 -> FaceCenter(UP)
                  3 -> EdgeInterpolateFallback(UP, EAST, 0.0)
                  else -> vertex.aoShader
              })}
+             .cycleVertices(if (nVidia) 0 else 1)
     listOf(q1, q2).forEach { transform(it.setFlatShader(FaceFlat(UP))).add() }
 }
 
diff --git a/src/main/kotlin/mods/octarinecore/client/render/Model.kt b/src/main/kotlin/mods/octarinecore/client/render/Model.kt
index 44f3032..a1ff3f3 100644
--- a/src/main/kotlin/mods/octarinecore/client/render/Model.kt
+++ b/src/main/kotlin/mods/octarinecore/client/render/Model.kt
@@ -81,6 +81,12 @@ data class Quad(val v1: Vertex, val v2: Vertex, val v3: Vertex, val v4: Vertex)
     fun setFlatShader(shader: Shader) = transformVI { vertex, idx -> vertex.copy(flatShader = shader) }
     val flipped: Quad get() = Quad(v4, v3, v2, v1)
 
+    fun cycleVertices(n: Int) = when(n % 4) {
+        1 -> Quad(v2, v3, v4, v1)
+        2 -> Quad(v3, v4, v1, v2)
+        3 -> Quad(v4, v1, v2, v3)
+        else -> this.copy()
+    }
 }
 
 /**