If you haven't, check youworkforthem.com, I'm sure you'll find something solid there. Source: about 1 year ago

Also, I didn't see it mentioned, but if it's environments that you are mostly after, one possible solution is to use HDRIs for the background. Obviously those are more limiting than a proper 3D environment but might be good if you are just doing static, one-off shots. You can get free ones of those from https://polyhaven.com and https://hdri-haven.com. Source: about 1 year ago

Https://polyhaven.com Polyhaven has free textures, models, and HDRIs. Source: about 1 year ago

As for rule 2 compliance, you may recall from the last post, I textured the duck with an image from unsplash. I used a terrain texture from polyhaven.com (was texturehaven.com back when I downloaded it.) I honestly cannot remember which tool I got the heightmap from, it was so long ago. But google terrain height map generator or some variant on that, I think there's like openGIS is one of them, and like,... Source: about 1 year ago

Huge shoutout to polyhaven.com their Material/Model Collection was a huge timesaver. Source: about 1 year ago

As per rule 2: I used a picture from unsplash to texture the duck. I used wood textures from polyhaven.com for the boat. All the modeling done in blender. Source: about 1 year ago