Illuminated paper Christmas stars from Nordic Nest:
- Oslo Christmas star, diameter 600 mm
https://www.nordicnest.com/brands/watt--veke/oslo-christmas-star-o60-cm/?variantId=511524-01 
- Lotus advent star, diameter 600 mm
https://www.nordicnest.com/brands/watt--veke/lotus-advent-star-o60-cm/?variantId=511520-01 
- Athena advent star, diameter 500 mm
https://www.nordicnest.com/brands/watt--veke/athena-advent-star-o50-cm/?variantId=511519-01 

Objects are partially attached, textures and materials have logical names

For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured taking into account PBR

Those who work in V-Ray versions lower than 3.1, be careful, in the materials in the BRDF section there is Microfaset GTR ( GGX ), if your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward - whichever suits you best