Three images of Rubia Stri and four different or slightly modified lights:
The first is lit with a large fresnel lamp, the dead giveaway of the rounding of the shadows and the way the light tapers off at the bottom of the image.
The second is the same Fresnel, but I placed a diffuser (a 5-in-1 large oval popup) between the lamp and the model and placed a Black foamcore board to eliminate spill light to the background.
The light is still hard, but it looks like there are two lights, which, in fact, there are:
You can see a hard shadow from the Fresnel and a soft and wider shadow from the illuminated diffusion.
You can also see the light doesn’t fall off the same way; it's more even across the model's body on the second.
Three is a direct Fresnel again, although somewhat underexposed.
For this, I used a Lomo Petzval 85mm with a weird Bokeh, which creates an artsy effect.
BTW. If you are on the connoisseur Tier and feel some of the texts are not that descriptive, it's usually because I reserve most of the teaching part of the Photographers and Vault tiers. If you are interested in the mechanics of photography, you will benefit from a lot of the added information by upgrading your Tier.