Minus the grumpiness:
If you are talking about Daz3d - a copy of a "scene" save file is not enough. You also need to have all the 3d assets that are referenced in the file installed in your local Daz data folders.
From a "legal" perspective technically you should purchase all the assets you need from 3D Asset stores like Daz or Renderosity/Renderotica, or create them yourself.
Morally, if you are making some product to sell or give away, it's very evil to pirate the assets you use. Those who give back to creators are the true heros.
Practically, if you want to test out rendering, then there are enough free assets around if you look to put together a basic scene.
Realistically, you'll want to hit up asset piracy forums like the "Asset releases" subforum of this site, or others like 3DLoad or Shadowcore and download some stuff. You'll need at a minimum: an "environment" asset to provide the background, a figure asset, some clothing for that figure, a hair asset for the figure, and a pose + expression pack.
Ove you've got all those assets, you'll need to install them. Use DazDIM, not the new installer thing which sucks.
Finally you are ready to make a scene:
Start a new daz scene, load the environment, load the figure, select the figure and load the clothing and hair, then move the figure to your location, then add a pose + expression, then manually adjust the pose/positioning, then add lights (2 or 3 point for best effect), then add a camera and point it, then set depth of field and adjust the camera focus, then enable iray for your preview and make sure it looks good, then select the camera viewpoint, then do a test render and adjust the render params to your liking, then do a final render.
Then notice all the tiny things that are wrong over the course of several hours, fixing and re-rendering. Finally, take it into post and edit the image so it POPs using photoshop. slam on a logo in the corner and paste the result into
https://f95zone.to/threads/daz3d-art-show-us-your-dazskill.4764/post-12698880 to get lots of likes from everyone except that weird guy who facepalms everyone.
Oh I forgot a few:
- find out that you don't have the right nvidia drivers
- find out you don't have a nvidia GPU
- realise you have exceeded the GPU VRAM and your render falls back to CPU and takes 47 hours.
- realise that DAZ has very very weird camera and UI controls that are different to all the other 3d packages on the market.
- realise that daz has complex slider controls for nearly everything and are arbitrarily categorised into various sub panel of the UI.