diff --git a/miniwin/sdl3gpu/include/miniwin_d3drmviewport_sdl3gpu.h b/miniwin/sdl3gpu/include/miniwin_d3drmviewport_sdl3gpu.h
index aef22e6c..58cc0555 100644
--- a/miniwin/sdl3gpu/include/miniwin_d3drmviewport_sdl3gpu.h
+++ b/miniwin/sdl3gpu/include/miniwin_d3drmviewport_sdl3gpu.h
@@ -50,9 +50,6 @@ struct Direct3DRMViewport_SDL3GPUImpl : public Direct3DRMObjectBase_SDL3GPUImpl<
 	D3DCOLOR m_backgroundColor = 0xFF000000;
 	DWORD m_width;
 	DWORD m_height;
-	D3DVALUE m_zMin;
-	D3DVALUE m_zMax;
-	D3DVALUE m_fov;
 	IDirect3DRMFrame* m_camera = nullptr;
 	SDL_GPUDevice* m_device;
 	SDL_GPUGraphicsPipeline* m_pipeline;
diff --git a/miniwin/sdl3gpu/src/miniwin_d3drmviewport.cpp b/miniwin/sdl3gpu/src/miniwin_d3drmviewport.cpp
index 4fd79f12..1c26ce9a 100644
--- a/miniwin/sdl3gpu/src/miniwin_d3drmviewport.cpp
+++ b/miniwin/sdl3gpu/src/miniwin_d3drmviewport.cpp
@@ -340,35 +340,35 @@ D3DRMPROJECTIONTYPE Direct3DRMViewport_SDL3GPUImpl::GetProjection()
 
 HRESULT Direct3DRMViewport_SDL3GPUImpl::SetFront(D3DVALUE z)
 {
-	m_zMin = z;
+	m_front = z;
 	return DD_OK;
 }
 
 D3DVALUE Direct3DRMViewport_SDL3GPUImpl::GetFront()
 {
-	return m_zMin;
+	return m_front;
 }
 
 HRESULT Direct3DRMViewport_SDL3GPUImpl::SetBack(D3DVALUE z)
 {
-	m_zMax = z;
+	m_back = z;
 	return DD_OK;
 }
 
 D3DVALUE Direct3DRMViewport_SDL3GPUImpl::GetBack()
 {
-	return m_zMax;
+	return m_back;
 }
 
 HRESULT Direct3DRMViewport_SDL3GPUImpl::SetField(D3DVALUE field)
 {
-	m_fov = field;
+	m_field = field;
 	return DD_OK;
 }
 
 D3DVALUE Direct3DRMViewport_SDL3GPUImpl::GetField()
 {
-	return m_fov;
+	return m_field;
 }
 
 DWORD Direct3DRMViewport_SDL3GPUImpl::GetWidth()