/usr/include/Nux-4.0/NuxGraphics/ is in libnux-4.0-dev 4.0.8+16.04.20160209-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/Nux-4.0/NuxGraphics/BitmapFormats.h
/usr/include/Nux-4.0/NuxGraphics/CairoGraphics.h
/usr/include/Nux-4.0/NuxGraphics/Events.h
/usr/include/Nux-4.0/NuxGraphics/FontRenderer.h
/usr/include/Nux-4.0/NuxGraphics/FontTexture.h
/usr/include/Nux-4.0/NuxGraphics/GLDeviceFrameBufferObject.h
/usr/include/Nux-4.0/NuxGraphics/GLDeviceObjects.h
/usr/include/Nux-4.0/NuxGraphics/GLError.h
/usr/include/Nux-4.0/NuxGraphics/GLPBuffer.h
/usr/include/Nux-4.0/NuxGraphics/GLRenderStates.h
/usr/include/Nux-4.0/NuxGraphics/GLResource.h
/usr/include/Nux-4.0/NuxGraphics/GLResourceManager.h
/usr/include/Nux-4.0/NuxGraphics/GLSh_ColorPicker.h
/usr/include/Nux-4.0/NuxGraphics/GLSh_DrawFunction.h
/usr/include/Nux-4.0/NuxGraphics/GLSh_Fill.h
/usr/include/Nux-4.0/NuxGraphics/GLShader.h
/usr/include/Nux-4.0/NuxGraphics/GLShaderParameter.h
/usr/include/Nux-4.0/NuxGraphics/GLTemplatePrimitiveBuffer.h
/usr/include/Nux-4.0/NuxGraphics/GLTextureResourceManager.h
/usr/include/Nux-4.0/NuxGraphics/GLTextureStates.h
/usr/include/Nux-4.0/NuxGraphics/GLThread.h
/usr/include/Nux-4.0/NuxGraphics/GLTimer.h
/usr/include/Nux-4.0/NuxGraphics/GLVertexResourceManager.h
/usr/include/Nux-4.0/NuxGraphics/GLWindowManager.h
/usr/include/Nux-4.0/NuxGraphics/GdkGraphics.h
/usr/include/Nux-4.0/NuxGraphics/GestureEvent.h
/usr/include/Nux-4.0/NuxGraphics/Gfx_Interface.h
/usr/include/Nux-4.0/NuxGraphics/GlobalGraphicsInitializer.h
/usr/include/Nux-4.0/NuxGraphics/GpuDevice.h
/usr/include/Nux-4.0/NuxGraphics/GraphicsDisplay.h
/usr/include/Nux-4.0/NuxGraphics/GraphicsDisplayX11.h
/usr/include/Nux-4.0/NuxGraphics/GraphicsEngine.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLAnimatedTexture.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLAsmShader.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLBaseTexture.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLCubeTexture.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLFrameBufferObject.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLGLSLShader.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLIndexBuffer.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLPixelBufferOject.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLQuery.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLRectangleTexture.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLResource.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLSurface.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLTexture2D.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLVertexBuffer.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLVertexDeclaration.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLVolume.h
/usr/include/Nux-4.0/NuxGraphics/IOpenGLVolumeTexture.h
/usr/include/Nux-4.0/NuxGraphics/ImageSurface.h
/usr/include/Nux-4.0/NuxGraphics/MeshData.h
/usr/include/Nux-4.0/NuxGraphics/MeshFileLoader-OBJ.h
/usr/include/Nux-4.0/NuxGraphics/NuxGraphics.h
/usr/include/Nux-4.0/NuxGraphics/NuxGraphicsObject.h
/usr/include/Nux-4.0/NuxGraphics/NuxGraphicsResources.h
/usr/include/Nux-4.0/NuxGraphics/OpenGLDefinitions.h
/usr/include/Nux-4.0/NuxGraphics/OpenGLMapping.h
/usr/include/Nux-4.0/NuxGraphics/RenderingPipe.h
/usr/include/Nux-4.0/NuxGraphics/RenderingPipeAsm.h
/usr/include/Nux-4.0/NuxGraphics/RenderingPipeGLSL.h
/usr/include/Nux-4.0/NuxGraphics/RenderingPipeTextureBlendShaderSource.h
/usr/include/Nux-4.0/NuxGraphics/RunTimeStats.h
/usr/include/Nux-4.0/NuxGraphics/VirtualKeyCodesX11.h
/usr/include/Nux-4.0/NuxGraphics/XInputWindow.h