diff --git a/3rdparty/nvtt/nvtt.cpp b/3rdparty/nvtt/nvtt.cpp
index 157afea..ef0cec6 100644
--- a/3rdparty/nvtt/nvtt.cpp
+++ b/3rdparty/nvtt/nvtt.cpp
@@ -8,47 +8,51 @@
 #include <string.h>
 #include <bx/uint32_t.h>
 
+BX_PRAGMA_DIAGNOSTIC_PUSH();
+BX_PRAGMA_DIAGNOSTIC_IGNORED_MSVC(4458) // warning C4458: declaration of 'x' hides class member
 #include "bc6h/zoh.h"
 #include "bc7/avpcl.h"
 #include "nvmath/vector.inl"
+BX_PRAGMA_DIAGNOSTIC_POP();
 
+BX_PRAGMA_DIAGNOSTIC_PUSH();
+BX_PRAGMA_DIAGNOSTIC_IGNORED_MSVC(4702) // warning C4702: unreachable code
 NVCORE_API int nvAbort(const char *, const char *, int , const char *, const char *, ...)
 {
 	abort();
 	return 0;
 }
+BX_PRAGMA_DIAGNOSTIC_POP();
 
 namespace nvtt
 {
-	using namespace nv;
-
 	void compressBC6H(const void* _input, uint32_t _width, uint32_t _height, uint32_t _srcStride, void* _output)
 	{
 		const uint8_t* src = (const uint8_t*)_input;
 		char* dst = (char*)_output;
 
-		for (uint32_t yy = 0; yy < _height; yy += 4)
+		for (uint32_t yy = 0; yy < _height; yy += ZOH::Tile::TILE_H)
 		{
-			for (uint32_t xx = 0; xx < _width; xx += 4)
+			for (uint32_t xx = 0; xx < _width; xx += ZOH::Tile::TILE_H)
 			{
 				const uint32_t bytesPerPixel = sizeof(float)*4;
-				const Vector4* srcRgba = (const Vector4*)&src[yy*_srcStride + xx*bytesPerPixel];
+				const nv::Vector4* srcRgba   = (const nv::Vector4*)&src[yy*_srcStride + xx*bytesPerPixel];
 				const uint32_t srcRgbaStride = _srcStride/bytesPerPixel;
 
 				ZOH::Utils::FORMAT = ZOH::SIGNED_F16;
-				ZOH::Tile zohTile(4, 4);
+				ZOH::Tile zohTile(ZOH::Tile::TILE_H, ZOH::Tile::TILE_H);
 
 				bx::memSet(zohTile.data, 0, sizeof(zohTile.data) );
 				bx::memSet(zohTile.importance_map, 0, sizeof(zohTile.importance_map) );
 
-				for (uint32_t blockY = 0; blockY < 4; ++blockY)
+				for (uint32_t blockY = 0; blockY < ZOH::Tile::TILE_H; ++blockY)
 				{
-					for (uint32_t blockX = 0; blockX < 4; ++blockX)
+					for (uint32_t blockX = 0; blockX < ZOH::Tile::TILE_W; ++blockX)
 					{
-						Vector4 color = srcRgba[blockY*srcRgbaStride + blockX];
-						zohTile.data[blockY][blockX].x = color.x;
-						zohTile.data[blockY][blockX].y = color.y;
-						zohTile.data[blockY][blockX].z = color.z;
+						nv::Vector4 color = srcRgba[blockY*srcRgbaStride + blockX];
+						zohTile.data[blockY][blockX].x = float(int16_t(bx::halfFromFloat(color.x) ) );
+						zohTile.data[blockY][blockX].y = float(int16_t(bx::halfFromFloat(color.y) ) );
+						zohTile.data[blockY][blockX].z = float(int16_t(bx::halfFromFloat(color.z) ) );
 					}
 				}
 
@@ -69,7 +73,7 @@ namespace nvtt
 			for (uint32_t xx = 0; xx < _width; xx += 4)
 			{
 				const uint32_t bytesPerPixel = sizeof(float) * 4;
-				const Vector4* srcRgba = (const Vector4*)&src[yy*_srcStride + xx*bytesPerPixel];
+				const nv::Vector4* srcRgba   = (const nv::Vector4*)&src[yy*_srcStride + xx*bytesPerPixel];
 				const uint32_t srcRgbaStride = _srcStride / bytesPerPixel;
 
 				AVPCL::mode_rgb     = false;
@@ -83,7 +87,7 @@ namespace nvtt
 				{
 					for (uint32_t blockX = 0; blockX < 4; ++blockX)
 					{
-						Vector4 color = srcRgba[blockY*srcRgbaStride + blockX];
+						nv::Vector4 color = srcRgba[blockY*srcRgbaStride + blockX];
 						avpclTile.data[blockY][blockX] = color * 255.0f;
 						avpclTile.importance_map[blockY][blockX] = 1.0f;
 					}