diff --git a/base/sources/backends/direct3d12_gpu.c b/base/sources/backends/direct3d12_gpu.c
index 4a2102a6..05081cad 100644
--- a/base/sources/backends/direct3d12_gpu.c
+++ b/base/sources/backends/direct3d12_gpu.c
@@ -1007,7 +1007,6 @@ static ShaderConstant findConstant(iron_gpu_shader_t *shader, const char *name)
 	ShaderConstant constant;
 	constant.name[0] = 0;
 	constant.offset = -1;
-	constant.size = 0;
 	return constant;
 }
 
@@ -1043,12 +1042,10 @@ iron_gpu_constant_location_t iron_gpu_pipeline_get_constant_location(struct iron
 	{
 		ShaderConstant constant = findConstant(pipe->vertex_shader, name);
 		location.impl.vertexOffset = constant.offset;
-		location.impl.vertexSize = constant.size;
 	}
 	{
 		ShaderConstant constant = findConstant(pipe->fragment_shader, name);
 		location.impl.fragmentOffset = constant.offset;
-		location.impl.fragmentSize = constant.size;
 	}
 
 	return location;
@@ -1096,6 +1093,11 @@ void iron_gpu_pipeline_compile(iron_gpu_pipeline_t *pipe) {
 	for (int i = 0; i < pipe->input_layout->size; ++i) {
 		vertexDesc[i].SemanticName = "TEXCOORD";
 		vertexDesc[i].SemanticIndex = findAttribute(pipe->vertex_shader, pipe->input_layout->elements[i].name).attribute;
+
+		if (pipe->kong) {
+			vertexDesc[i].SemanticIndex = i;
+		}
+
 		vertexDesc[i].InputSlot = 0;
 		vertexDesc[i].AlignedByteOffset = (i == 0) ? 0 : D3D12_APPEND_ALIGNED_ELEMENT;
 		vertexDesc[i].InputSlotClass = D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA;
@@ -1277,7 +1279,6 @@ void iron_gpu_shader_init(iron_gpu_shader_t *shader, const void *_data, size_t l
 	shader->impl.texturesCount = texCount;
 
 	uint8_t constantCount = data[index++];
-	shader->impl.constantsSize = 0;
 	for (unsigned i = 0; i < constantCount; ++i) {
 		char name[64];
 		for (unsigned i2 = 0; i2 < 63; ++i2) {
@@ -1288,12 +1289,11 @@ void iron_gpu_shader_init(iron_gpu_shader_t *shader, const void *_data, size_t l
 		ShaderConstant constant;
 		memcpy(&constant.offset, &data[index], sizeof(constant.offset));
 		index += 4;
-		memcpy(&constant.size, &data[index], sizeof(constant.size));
+		// memcpy(&constant.size, &data[index], sizeof(constant.size));
 		index += 4;
 		index += 2; // columns and rows
 		strcpy(constant.name, name);
 		shader->impl.constants[i] = constant;
-		shader->impl.constantsSize = constant.offset + constant.size;
 	}
 
 	shader->impl.length = (int)length - index;
diff --git a/base/sources/backends/direct3d12_gpu.h b/base/sources/backends/direct3d12_gpu.h
index 65609884..6787de3e 100644
--- a/base/sources/backends/direct3d12_gpu.h
+++ b/base/sources/backends/direct3d12_gpu.h
@@ -82,9 +82,7 @@ typedef struct {
 
 typedef struct {
 	int vertexOffset;
-	uint32_t vertexSize;
 	int fragmentOffset;
-	uint32_t fragmentSize;
 } gpu_constant_location_impl_t;
 
 typedef struct iron_gpu_sampler_impl {
@@ -94,7 +92,6 @@ typedef struct iron_gpu_sampler_impl {
 typedef struct {
 	char name[64];
 	uint32_t offset;
-	uint32_t size;
 } ShaderConstant;
 
 typedef struct {
@@ -109,7 +106,6 @@ typedef struct {
 
 typedef struct {
 	ShaderConstant constants[32];
-	int constantsSize;
 	ShaderAttribute attributes[32];
 	ShaderTexture textures[32];
 	int texturesCount;
diff --git a/base/sources/iron_system.c b/base/sources/iron_system.c
index 3c353a38..b874d0ca 100644
--- a/base/sources/iron_system.c
+++ b/base/sources/iron_system.c
@@ -259,8 +259,7 @@ bool iron_internal_frame(void) {
 	return running;
 }
 
-// void iron_start(void) {
-void kinc_start(void) {
+void iron_start(void) {
 	running = true;
 
 #if !defined(IRON_WASM)
diff --git a/base/sources/iron_system.h b/base/sources/iron_system.h
index 2b4444ea..733568ff 100644
--- a/base/sources/iron_system.h
+++ b/base/sources/iron_system.h
@@ -99,8 +99,7 @@ iron_ticks_t iron_timestamp(void);
 int iron_cpu_cores(void);
 int iron_hardware_threads(void);
 double iron_time(void);
-// void iron_start(void);
-void kinc_start(void);
+void iron_start(void);
 void iron_stop(void);
 void iron_set_keep_screen_on(bool on);