message: Use texture_pointer_ref where appropriate
diff: @@ -386,8 +386,8 @@ struct renderer : viewer_type
  // textures and texture references
  // On the CPU, we can simply "ref" the arrays with data
  - std::vector<texture_ref<float, 3>> volumes;
  - std::vector<texture_ref<vec4, 1>> transfuncs;
  + std::vector<texture_pointer_ref<float, 3>> volumes;
  + std::vector<texture_pointer_ref<vec4, 1>> transfuncs;
  #ifdef __CUDACC__
  // On the GPU, we need permanent storage in texture memory
  