Help Needed with Automating HDRI to Rhino Environment Script

Scripting
, , , ,
1

Hello Rhino Community,

I’m trying to automate the process of creating Rhino environments using a batch of HDRI files. I am not very experienced in scripting and tried to come up with something using ChatGPT.

I need a script that performs the following tasks:

  1. For each HDRI file, create a new Rhino environment (type: High Dynamic Range Texture).
  2. Set the HDRI file as the environment background.
  3. Adjust the saturation to 0.
  4. Save the environment in a specified folder with the HDRI’s filename.

Here’s the script I’ve been working on:

    import os
    import rhinoscriptsyntax as rs
    import Rhino
    import scriptcontext as sc
    import System
    
    def create_environment_from_hdri(hdri_path, save_folder):
        hdri_name = os.path.splitext(os.path.basename(hdri_path))[0]
        render_environment_type_id = System.Guid("1e591e9e-5ef5-484e-bcad-fd5c3e41f869")
        render_texture_type_id = System.Guid("8e0ab46d-d29c-49d1-a61d-6cbe6d0b0139")
    
        environment = Rhino.Render.RenderContent.Create(render_environment_type_id, hdri_name, sc.doc)
        if environment is None:
            print("Failed to create environment for {}".format(hdri_name))
            return
    
        texture = Rhino.Render.RenderContent.Create(render_texture_type_id, hdri_name, sc.doc)
        texture.BeginChange(Rhino.Render.RenderContent.ChangeContexts.Program)
        texture.SetParameter("filename", hdri_path)
        texture.EndChange()
    
        environment.BeginChange(Rhino.Render.RenderContent.ChangeContexts.Program)
        environment.SetChild(texture, "background-texture")
        environment.EndChange()
    
        environment.BeginChange(Rhino.Render.RenderContent.ChangeContexts.Program)
        environment.SetParameter("saturation", 0.0)
        environment.EndChange()
    
        sc.doc.RenderEnvironments.Add(environment)
        save_path = os.path.join(save_folder, hdri_name + ".renv")
        environment.SaveToFile(save_path)
    
    def main():
        hdri_folder = rs.BrowseForFolder(message="Select folder containing HDRI files")
        if not hdri_folder:
            return
    
        save_folder = rs.BrowseForFolder(message="Select folder to save Rhino environments")
        if not save_folder:
            return
    
        for file_name in os.listdir(hdri_folder):
            if file_name.lower().endswith(".hdr") or file_name.lower().endswith(".exr"):
                hdri_path = os.path.join(hdri_folder, file_name)
                create_environment_from_hdri(hdri_path, save_folder)
    
        rs.MessageBox("Finished creating environments from HDRI files", 0, "Completed")
    
    if __name__ == "__main__":
        main()

Unfortunately, I keep encountering errors such as “‘type’ object has no attribute ‘ClassId’” and “‘type’ object has no attribute ‘NewRenderEnvironmentContentTypeId’”. I’m not sure if I’m using the correct methods or type IDs.

Could anyone provide guidance on how to properly create and configure Rhino render environments using HDRI files? Any help would be greatly appreciated!

Thank you!

2

I am currently not at my dev environment, but you could look through

https://jesterking.github.io/rhipy

There is a script that shows you how to create an HDRTexture.

Further the examples on creating materials and accessing parameters for both getting and setting properties.

I’ll type up a literate example for environment creation later and link that here too.

4

I have added an example here

https://jesterking.github.io/rhipy/create_hdri_environment.html

the final script is rhipy/create_hdri_environment.py at master · jesterKing/rhipy · GitHub