These filters also tend to give more of a hazy, lower resolution look to images, similar to your sample picture.
All you need, once you have the filter, are point light sources/highlights in the image and they will be rendered as stars.
That crazier looking star in the lower left might be from a linear light source/highlight aligned with the direction of one of the axes of the stars but cross cut by the other two axes.
Lighting is just a single, hard light source to camera right at about eye level, pointed slightly down. Since there seems to be a spotlight effect, the light might have had a grid or barndoors or even a Leko/zoomspot modifier.
It looks to me like the photographer used a star effect filter on the lens.
Most of them are 4-pointed stars but there are some that do 6-pointed stars. See here for one example: https://www.amazon.com/Tiffen-58mm-6-Point-Star-Filter/dp/B00004ZCDV
These filters also tend to give more of a hazy, lower resolution look to images, similar to your sample picture.
All you need, once you have the filter, are point light sources/highlights in the image and they will be rendered as stars.
That crazier looking star in the lower left might be from a linear light source/highlight aligned with the direction of one of the axes of the stars but cross cut by the other two axes.
Lighting is just a single, hard light source to camera right at about eye level, pointed slightly down. Since there seems to be a spotlight effect, the light might have had a grid or barndoors or even a Leko/zoomspot modifier.
I think they used a time machine (or lots of LSD) to travel back to the 80s.