diff --git a/README.md b/README.md
index 9783e97..c1b7592 100644
--- a/README.md
+++ b/README.md
@@ -100,6 +100,7 @@ cgltf supports core glTF 2.0:
 
 cgltf also supports some glTF extensions:
 - EXT_meshopt_compression
+- EXT_mesh_gpu_instancing
 - KHR_draco_mesh_compression (requires a library like [Google's Draco](https://github.com/google/draco) for decompression though)
 - KHR_lights_punctual
 - KHR_materials_clearcoat
@@ -112,6 +113,8 @@ cgltf also supports some glTF extensions:
 - KHR_materials_unlit
 - KHR_materials_variants
 - KHR_materials_volume
+- KHR_materials_iridescence
+- KHR_materials_diffuse_transmission
 - KHR_texture_basisu (requires a library like [Binomial Basisu](https://github.com/BinomialLLC/basis_universal) for transcoding to native compressed texture)
 - KHR_texture_transform
 
diff --git a/cgltf.h b/cgltf.h
index 01948a8..550aee5 100644
--- a/cgltf.h
+++ b/cgltf.h
@@ -505,6 +505,14 @@ typedef struct cgltf_iridescence
 	cgltf_texture_view iridescence_thickness_texture;
 } cgltf_iridescence;
 
+typedef struct cgltf_diffuse_transmission
+{
+	cgltf_texture_view diffuse_transmission_texture;
+	cgltf_float diffuse_transmission_factor;
+	cgltf_float diffuse_transmission_color_factor[3];
+	cgltf_texture_view diffuse_transmission_color_texture;
+} cgltf_diffuse_transmission;
+
 typedef struct cgltf_material
 {
 	char* name;
@@ -518,6 +526,7 @@ typedef struct cgltf_material
 	cgltf_bool has_sheen;
 	cgltf_bool has_emissive_strength;
 	cgltf_bool has_iridescence;
+	cgltf_bool has_diffuse_transmission;
 	cgltf_pbr_metallic_roughness pbr_metallic_roughness;
 	cgltf_pbr_specular_glossiness pbr_specular_glossiness;
 	cgltf_clearcoat clearcoat;
@@ -528,6 +537,7 @@ typedef struct cgltf_material
 	cgltf_volume volume;
 	cgltf_emissive_strength emissive_strength;
 	cgltf_iridescence iridescence;
+	cgltf_diffuse_transmission diffuse_transmission;
 	cgltf_texture_view normal_texture;
 	cgltf_texture_view occlusion_texture;
 	cgltf_texture_view emissive_texture;
@@ -1897,7 +1907,7 @@ void cgltf_free(cgltf_data* data)
 		{
 			cgltf_free_extensions(data, data->materials[i].transmission.transmission_texture.extensions, data->materials[i].transmission.transmission_texture.extensions_count);
 		}
-		if (data->materials[i].has_volume)
+		if(data->materials[i].has_volume)
 		{
 			cgltf_free_extensions(data, data->materials[i].volume.thickness_texture.extensions, data->materials[i].volume.thickness_texture.extensions_count);
 		}
@@ -1911,6 +1921,11 @@ void cgltf_free(cgltf_data* data)
 			cgltf_free_extensions(data, data->materials[i].iridescence.iridescence_texture.extensions, data->materials[i].iridescence.iridescence_texture.extensions_count);
 			cgltf_free_extensions(data, data->materials[i].iridescence.iridescence_thickness_texture.extensions, data->materials[i].iridescence.iridescence_thickness_texture.extensions_count);
 		}
+		if (data->materials[i].has_diffuse_transmission)
+		{
+			cgltf_free_extensions(data, data->materials[i].diffuse_transmission.diffuse_transmission_texture.extensions, data->materials[i].diffuse_transmission.diffuse_transmission_texture.extensions_count);
+			cgltf_free_extensions(data, data->materials[i].diffuse_transmission.diffuse_transmission_color_texture.extensions, data->materials[i].diffuse_transmission.diffuse_transmission_color_texture.extensions_count);
+		}
 
 		cgltf_free_extensions(data, data->materials[i].normal_texture.extensions, data->materials[i].normal_texture.extensions_count);
 		cgltf_free_extensions(data, data->materials[i].occlusion_texture.extensions, data->materials[i].occlusion_texture.extensions_count);
@@ -4027,6 +4042,52 @@ static int cgltf_parse_json_iridescence(cgltf_options* options, jsmntok_t const*
 	return i;
 }
 
+static int cgltf_parse_json_diffuse_transmission(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_diffuse_transmission* out_diff_transmission)
+{
+	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+	int size = tokens[i].size;
+	++i;
+
+	// Defaults
+	cgltf_fill_float_array(out_diff_transmission->diffuse_transmission_color_factor, 3, 1.0f);
+	out_diff_transmission->diffuse_transmission_factor = 0.f;
+
+	for (int j = 0; j < size; ++j)
+	{
+		CGLTF_CHECK_KEY(tokens[i]);
+
+		if (cgltf_json_strcmp(tokens + i, json_chunk, "diffuseTransmissionFactor") == 0)
+		{
+			++i;
+			out_diff_transmission->diffuse_transmission_factor = cgltf_json_to_float(tokens + i, json_chunk);
+			++i;
+		}
+		else if (cgltf_json_strcmp(tokens + i, json_chunk, "diffuseTransmissionTexture") == 0)
+		{
+			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_diff_transmission->diffuse_transmission_texture);
+		}
+		else if (cgltf_json_strcmp(tokens + i, json_chunk, "diffuseTransmissionColorFactor") == 0)
+		{
+			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_diff_transmission->diffuse_transmission_color_factor, 3);
+		}
+		else if (cgltf_json_strcmp(tokens + i, json_chunk, "diffuseTransmissionColorTexture") == 0)
+		{
+			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_diff_transmission->diffuse_transmission_color_texture);
+		}
+		else
+		{
+			i = cgltf_skip_json(tokens, i + 1);
+		}
+
+		if (i < 0)
+		{
+			return i;
+		}
+	}
+
+	return i;
+}
+
 static int cgltf_parse_json_image(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_image* out_image)
 {
 	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
@@ -4415,6 +4476,11 @@ static int cgltf_parse_json_material(cgltf_options* options, jsmntok_t const* to
 					out_material->has_iridescence = 1;
 					i = cgltf_parse_json_iridescence(options, tokens, i + 1, json_chunk, &out_material->iridescence);
 				}
+				else if (cgltf_json_strcmp(tokens + i, json_chunk, "KHR_materials_diffuse_transmission") == 0)
+				{
+					out_material->has_diffuse_transmission = 1;
+					i = cgltf_parse_json_diffuse_transmission(options, tokens, i + 1, json_chunk, &out_material->diffuse_transmission);
+				}
 				else
 				{
 					i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_material->extensions[out_material->extensions_count++]));
@@ -6269,6 +6335,9 @@ static int cgltf_fixup_pointers(cgltf_data* data)
 
 		CGLTF_PTRFIXUP(data->materials[i].iridescence.iridescence_texture.texture, data->textures, data->textures_count);
 		CGLTF_PTRFIXUP(data->materials[i].iridescence.iridescence_thickness_texture.texture, data->textures, data->textures_count);
+
+		CGLTF_PTRFIXUP(data->materials[i].diffuse_transmission.diffuse_transmission_texture.texture, data->textures, data->textures_count);
+		CGLTF_PTRFIXUP(data->materials[i].diffuse_transmission.diffuse_transmission_color_texture.texture, data->textures, data->textures_count);
 	}
 
 	for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
diff --git a/cgltf_write.h b/cgltf_write.h
index 061d8fe..57543b6 100644
--- a/cgltf_write.h
+++ b/cgltf_write.h
@@ -87,6 +87,7 @@ cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size si
 #define CGLTF_EXTENSION_FLAG_MATERIALS_EMISSIVE_STRENGTH (1 << 13)
 #define CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING (1 << 14)
 #define CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE (1 << 15)
+#define CGLTF_EXTENSION_FLAG_MATERIALS_DIFFUSE_TRANSMISSION (1 << 16)
 
 typedef struct {
 	char* buffer;
@@ -601,6 +602,11 @@ static void cgltf_write_material(cgltf_write_context* context, const cgltf_mater
 		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE;
 	}
 
+	if (material->has_diffuse_transmission)
+	{
+		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_DIFFUSE_TRANSMISSION;
+	}
+
 	if (material->has_pbr_metallic_roughness)
 	{
 		const cgltf_pbr_metallic_roughness* params = &material->pbr_metallic_roughness;
@@ -617,7 +623,7 @@ static void cgltf_write_material(cgltf_write_context* context, const cgltf_mater
 		cgltf_write_line(context, "}");
 	}
 
-	if (material->unlit || material->has_pbr_specular_glossiness || material->has_clearcoat || material->has_ior || material->has_specular || material->has_transmission || material->has_sheen || material->has_volume || material->has_emissive_strength || material->has_iridescence)
+	if (material->unlit || material->has_pbr_specular_glossiness || material->has_clearcoat || material->has_ior || material->has_specular || material->has_transmission || material->has_sheen || material->has_volume || material->has_emissive_strength || material->has_iridescence || material->has_diffuse_transmission)
 	{
 		cgltf_write_line(context, "\"extensions\": {");
 		if (material->has_clearcoat)
@@ -728,6 +734,19 @@ static void cgltf_write_material(cgltf_write_context* context, const cgltf_mater
 			CGLTF_WRITE_TEXTURE_INFO("iridescenceThicknessTexture", params->iridescence_thickness_texture);
 			cgltf_write_line(context, "}");
 		}
+		if (material->has_diffuse_transmission)
+		{
+			const cgltf_diffuse_transmission* params = &material->diffuse_transmission;
+			cgltf_write_line(context, "\"KHR_materials_diffuse_transmission\": {");
+			CGLTF_WRITE_TEXTURE_INFO("diffuseTransmissionTexture", params->diffuse_transmission_texture);
+			cgltf_write_floatprop(context, "diffuseTransmissionFactor", params->diffuse_transmission_factor, 0.f);
+			if (cgltf_check_floatarray(params->diffuse_transmission_color_factor, 3, 1.f))
+			{
+				cgltf_write_floatarrayprop(context, "diffuseTransmissionColorFactor", params->diffuse_transmission_color_factor, 3);
+			}
+			CGLTF_WRITE_TEXTURE_INFO("diffuseTransmissionColorTexture", params->diffuse_transmission_color_texture);
+			cgltf_write_line(context, "}");
+		}
 		cgltf_write_line(context, "}");
 	}
 
@@ -1164,6 +1183,9 @@ static void cgltf_write_extensions(cgltf_write_context* context, uint32_t extens
 	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE) {
 		cgltf_write_stritem(context, "KHR_materials_iridescence");
 	}
+	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_DIFFUSE_TRANSMISSION) {
+		cgltf_write_stritem(context, "KHR_materials_diffuse_transmission");
+	}
 	if (extension_flags & CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING) {
 		cgltf_write_stritem(context, "EXT_mesh_gpu_instancing");
 	}