When adding custom enviroment every thing goes glossy?

When i create a cube map, upload the images to amazon S3 and copy the folder url into the custom environment box my materials go from being as define to glossy? See below images. ANy idea whats going on?

Could you give me the following information:

  • A link to the model on ShapeDiver
  • The environment preset used on the top picture (if any)
  • The S3 link you are using for the custom environment

My first guess is that the material is glossy in both cases (high metalness and/or low roughness) but on the top picture no environment is loaded so there are no reflections to show. In that case, it might be a bug in the Grasshopper definition.