diff --git a/src/nvimage/DirectDrawSurface.cpp b/src/nvimage/DirectDrawSurface.cpp
index 9c48457..303d62b 100644
--- a/src/nvimage/DirectDrawSurface.cpp
+++ b/src/nvimage/DirectDrawSurface.cpp
@@ -1242,6 +1242,7 @@ void DirectDrawSurface::readLinearImage(Image * img)
 
     const uint w = img->width();
     const uint h = img->height();
+    const uint d = img->depth();
 
     uint rshift, rsize;
     PixelFormat::maskShiftAndSize(header.pf.rmask, &rshift, &rsize);
@@ -1260,20 +1261,23 @@ void DirectDrawSurface::readLinearImage(Image * img)
 #pragma NV_MESSAGE("TODO: Support floating point linear images and other FOURCC codes.")
 
     // Read linear RGB images.
-    for (uint y = 0; y < h; y++)
+    for (uint z = 0; z < d; z++)
     {
-        for (uint x = 0; x < w; x++)
+        for (uint y = 0; y < h; y++)
         {
-            uint c = 0;
-            stream->serialize(&c, byteCount);
+            for (uint x = 0; x < w; x++)
+            {
+                uint c = 0;
+                stream->serialize(&c, byteCount);
 
-            Color32 pixel(0, 0, 0, 0xFF);
-            pixel.r = PixelFormat::convert((c & header.pf.rmask) >> rshift, rsize, 8);
-            pixel.g = PixelFormat::convert((c & header.pf.gmask) >> gshift, gsize, 8);
-            pixel.b = PixelFormat::convert((c & header.pf.bmask) >> bshift, bsize, 8);
-            pixel.a = PixelFormat::convert((c & header.pf.amask) >> ashift, asize, 8);
+                Color32 pixel(0, 0, 0, 0xFF);
+                pixel.r = PixelFormat::convert((c & header.pf.rmask) >> rshift, rsize, 8);
+                pixel.g = PixelFormat::convert((c & header.pf.gmask) >> gshift, gsize, 8);
+                pixel.b = PixelFormat::convert((c & header.pf.bmask) >> bshift, bsize, 8);
+                pixel.a = PixelFormat::convert((c & header.pf.amask) >> ashift, asize, 8);
 
-            img->pixel(x, y) = pixel;
+                img->pixel(x, y, z) = pixel;
+            }
         }
     }
 }
diff --git a/src/nvimage/FloatImage.cpp b/src/nvimage/FloatImage.cpp
index 3b6c070..7f591e6 100644
--- a/src/nvimage/FloatImage.cpp
+++ b/src/nvimage/FloatImage.cpp
@@ -1443,7 +1443,7 @@ FloatImage* FloatImage::clone() const
 {
     FloatImage* copy = new FloatImage();
 
-    copy->allocate(m_componentCount, m_width, m_height);
+    copy->allocate(m_componentCount, m_width, m_height, m_depth);
     memcpy(copy->m_mem, m_mem, m_floatCount * sizeof(float));
 
     return copy;
diff --git a/src/nvimage/Image.h b/src/nvimage/Image.h
index 729ccd4..4ab00a9 100644
--- a/src/nvimage/Image.h
+++ b/src/nvimage/Image.h
@@ -48,8 +48,8 @@ namespace nv
         const Color32 & pixel(uint idx) const;
         Color32 & pixel(uint idx);
 
-        const Color32 & pixel(uint x, uint y) const;
-        Color32 & pixel(uint x, uint y);
+        const Color32 & pixel(uint x, uint y, uint z = 0) const;
+        Color32 & pixel(uint x, uint y,  uint z = 0);
 
         Format format() const;
         void setFormat(Format f);
@@ -68,16 +68,16 @@ namespace nv
     };
 
 
-    inline const Color32 & Image::pixel(uint x, uint y) const
+    inline const Color32 & Image::pixel(uint x, uint y, uint z) const
     {
-        nvDebugCheck(x < m_width && y < m_height);
-        return pixel(y * m_width + x);
+        nvDebugCheck(x < m_width && y < m_height && z < m_depth);
+        return pixel((z * m_height + y) * m_width + x);
     }
 
-    inline Color32 & Image::pixel(uint x, uint y)
+    inline Color32 & Image::pixel(uint x, uint y, uint z)
     {
-        nvDebugCheck(x < m_width && y < m_height);
-        return pixel(y * m_width + x);
+        nvDebugCheck(x < m_width && y < m_height && z < m_depth);
+        return pixel((z * m_height + y) * m_width + x);
     }
 
 } // nv namespace