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