diff --git a/res/org/lwjgl/demo/opengl/shader/raymarching.vs.glsl b/res/org/lwjgl/demo/opengl/shader/raymarching.vs.glsl
index 0c391294..bf0324fc 100644
--- a/res/org/lwjgl/demo/opengl/shader/raymarching.vs.glsl
+++ b/res/org/lwjgl/demo/opengl/shader/raymarching.vs.glsl
@@ -1,3 +1,7 @@
+/*
+ * Copyright LWJGL. All rights reserved.
+ * License terms: https://www.lwjgl.org/license
+ */
 #version 330 core
 
 layout (location = 0) in vec3 pos;
diff --git a/src/org/lwjgl/demo/opengl/shader/RayMarchingVolumeTexture.java b/src/org/lwjgl/demo/opengl/shader/RayMarchingVolumeTexture.java
index 4fe05c73..172b98be 100644
--- a/src/org/lwjgl/demo/opengl/shader/RayMarchingVolumeTexture.java
+++ b/src/org/lwjgl/demo/opengl/shader/RayMarchingVolumeTexture.java
@@ -197,7 +197,7 @@ private Volume create3dVolume(String resource, int x, int y, int z) throws IOExc
             BufferedInputStream bis = new BufferedInputStream(is);
             new MagicaVoxelLoader().read(bis, new MagicaVoxelLoader.Callback() {
                 public void voxel(int x, int y, int z, byte c) {
-                    v.field[idx(x, z, y, dims.x, dims.y)] = c;
+                    v.field[idx(x, z, dims.z - 1 - y, dims.x, dims.y)] = c;
                 }
                 public void size(int x, int y, int z) {
                     dims.x = x;