diff --git a/code/nel/tools/3d/s3tc_compressor_lib/s3tc_compressor.cpp b/code/nel/tools/3d/s3tc_compressor_lib/s3tc_compressor.cpp
index 49d4e5923..366c909c0 100644
--- a/code/nel/tools/3d/s3tc_compressor_lib/s3tc_compressor.cpp
+++ b/code/nel/tools/3d/s3tc_compressor_lib/s3tc_compressor.cpp
@@ -28,33 +28,34 @@ static void		compressMipMap(uint8 *pixSrc, sint width, sint height, vector<uint8
 	//===========================================
 	memset(&dest, 0, sizeof(dest));
 	dest.dwSize = sizeof(dest);
-	dest.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT;
+	dest.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT | DDSD_LINEARSIZE;
 	dest.dwHeight = height;
 	dest.dwWidth = width;
 	dest.ddpf.dwSize = sizeof(CS3TCCompressor::DDS_PIXELFORMAT);
 	dest.ddpf.dwFlags = DDPF_FOURCC;
 	dest.dwCaps = DDSCAPS_TEXTURE;
+	dest.dwLinearSize = std::max(4, width) * std::max(4, height);
 
 	// Setting flags
 	int flags = squish::kColourIterativeClusterFit; // for best quality
 	switch(algo)
 	{
 		case DXT1:
-			flags |= squish::kDxt1;
-			break;
 		case DXT1A:
 			flags |= squish::kDxt1;
+			dest.ddpf.dwFourCC = MAKEFOURCC('D','X', 'T', '1');
+			dest.dwLinearSize /= 2;
 			break;
 		case DXT3:
 			flags |= squish::kDxt3;
+			dest.ddpf.dwFourCC = MAKEFOURCC('D','X', 'T', '3');
 			break;
 		case DXT5:
 			flags |= squish::kDxt5;
+			dest.ddpf.dwFourCC = MAKEFOURCC('D','X', 'T', '5');
 			break;
 	}
 
-	
-
 	// Encoding
 	//===========
 	// resize dest.
@@ -64,20 +65,6 @@ static void		compressMipMap(uint8 *pixSrc, sint width, sint height, vector<uint8
 	float weight[3] = {0.3086f, 0.6094f, 0.0820f};
 	squish::CompressImage(pixSrc, width, height, &(*compdata.begin()), flags, weight);
 
-	switch(algo)
-	{
-		case DXT1:
-		case DXT1A:
-			dest.ddpf.dwFourCC = MAKEFOURCC('D','X', 'T', '1');
-			break;
-		case DXT3:
-			dest.ddpf.dwFourCC = MAKEFOURCC('D','X', 'T', '3');
-			break;
-		case DXT5:
-			dest.ddpf.dwFourCC = MAKEFOURCC('D','X', 'T', '5');
-			break;
-	}
-
 	/* S3TC is a very good compressor, but make BIG mistakes in some case with  DXTC5 and DXTC3
 	*/
 	if( algo==DXT5 || algo==DXT3 )