diff --git a/include/bimg/encode.h b/include/bimg/encode.h
index 7e1de03..326728d 100644
--- a/include/bimg/encode.h
+++ b/include/bimg/encode.h
@@ -87,7 +87,6 @@ namespace bimg
 		, uint32_t _width
 		, uint32_t _height
 		, uint32_t _srcPitch
-		, float _edge
 		, const void* _src
 		);
 
diff --git a/src/image_encode.cpp b/src/image_encode.cpp
index 5d4feeb..879c3d3 100644
--- a/src/image_encode.cpp
+++ b/src/image_encode.cpp
@@ -368,7 +368,7 @@ namespace bimg
 		BX_FREE(_allocator, gy);
 	}
 
-	void imageMakeDist(bx::AllocatorI* _allocator, void* _dst, uint32_t _width, uint32_t _height, uint32_t _srcPitch, float _edge, const void* _src)
+	void imageMakeDist(bx::AllocatorI* _allocator, void* _dst, uint32_t _width, uint32_t _height, uint32_t _srcPitch, const void* _src)
 	{
 		const uint32_t numPixels = _width*_height;
 
@@ -399,12 +399,9 @@ namespace bimg
 
 		uint8_t* dst = (uint8_t*)_dst;
 
-		double edgeOffset = _edge*0.5;
-		double invEdge = 1.0/_edge;
-
 		for (uint32_t ii = 0; ii < numPixels; ++ii)
 		{
-			double dist = bx::clamp( ( (outside[ii] - inside[ii])+edgeOffset) * invEdge, 0.0, 1.0);
+			double dist = bx::clamp( (outside[ii] - inside[ii]) * 1.0/16.0 + 0.5, 0.0, 1.0);
 			dst[ii] = 255-uint8_t(dist * 255.0);
 		}
 
diff --git a/tools/texturec/texturec.cpp b/tools/texturec/texturec.cpp
index 99a8f80..f74671a 100644
--- a/tools/texturec/texturec.cpp
+++ b/tools/texturec/texturec.cpp
@@ -256,7 +256,8 @@ bimg::ImageContainer* convert(bx::AllocatorI* _allocator, const void* _inputData
 			&& (bimg::LightingModel::Count == _options.radiance)
 			;
 
-		if (needResize)
+		if (!_options.sdf
+		&&  needResize)
 		{
 			bimg::ImageContainer* src = bimg::imageConvert(_allocator, bimg::TextureFormat::RGBA32F, *input, false);
 
@@ -630,7 +631,6 @@ bimg::ImageContainer* convert(bx::AllocatorI* _allocator, const void* _inputData
 						, mip.m_width
 						, mip.m_height
 						, mip.m_width
-						, _options.edge
 						, rgba
 						);
 				}
@@ -848,7 +848,7 @@ void help(const char* _error = NULL, bool _showHelp = true)
 		  "  -n, --normalmap          Input texture is normal map.\n"
 		  "      --equirect           Input texture is equirectangular projection of cubemap.\n"
 		  "      --strip              Input texture is horizontal strip of cubemap.\n"
-		  "      --sdf <edge>         Compute SDF texture.\n"
+		  "      --sdf                Compute SDF texture.\n"
 		  "      --ref <alpha>        Alpha reference value.\n"
 		  "      --iqa                Image Quality Assessment\n"
 		  "      --pma                Premultiply alpha into RGB channel.\n"
@@ -970,28 +970,17 @@ int main(int _argc, const char* _argv[])
 
 	Options options;
 
-	const char* edgeOpt = cmdLine.findOption("sdf");
-	if (NULL != edgeOpt)
+	const char* alphaRef = cmdLine.findOption("ref");
+	if (NULL != alphaRef)
 	{
-		options.sdf  = true;
-		if (!bx::fromString(&options.edge, edgeOpt) )
+		options.alphaTest = true;
+		if (!bx::fromString(&options.edge, alphaRef))
 		{
-			options.edge = 255.0f;
-		}
-	}
-	else
-	{
-		const char* alphaRef = cmdLine.findOption("ref");
-		if (NULL != alphaRef)
-		{
-			options.alphaTest = true;
-			if (!bx::fromString(&options.edge, alphaRef))
-			{
-				options.edge = 0.5f;
-			}
+			options.edge = 0.5f;
 		}
 	}
 
+	options.sdf       = cmdLine.hasArg("sdf");
 	options.mips      = cmdLine.hasArg('m', "mips");
 	options.normalMap = cmdLine.hasArg('n', "normalmap");
 	options.equirect  = cmdLine.hasArg("equirect");