The Oscar-winning movie Flow was made entirely with Blender, a free software accessible to artists of any age or level.

GitHub repository "Awesome Blender" provides curated links to free and premium 3D textures. Websites like AmbientCG, Free PBR ...

You can also check out the software free for 30-days. Blender is an open-source 3D creation tool supported by a generous community of developers and users, and is free for personal and commercial use.