message: OpenGL: enable cubemap filtering on desktop.
  According to the OpenGL spec, proper cubemap filtering is disabled by
  default in non-ES OpenGL.
diff: @@ -115,10 +115,11 @@ OpenGLContext::OpenGLContext() noexcept {
  disable(GL_DITHER);
  enable(GL_DEPTH_TEST);
  - // With desktop GL, the application must enable point size to allow vertex shaders to set it,
  - // but with OpenGL ES, this is always on and there is no enable flag.
  + // Point sprite size and seamless cubemap filtering are disabled by default in desktop GL.
  + // In OpenGL ES, these flags do not exist because they are always on.
  #if GL41_HEADERS
  enable(GL_PROGRAM_POINT_SIZE);
  + enable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
  #endif
  // TODO: Don't enable scissor when it is not necessary. This optimization could be done here in
  