ambientCG vs FreePBRTextures

ambientCG is a free library of downloadable assets for 3D art, architectural visualization, game development, VFX, and related work. Its collection includes PBR materials, HDRIs, Substance graphs, atlases, decals, photo textures, models, and terrain; the homepage lists 2,895 assets. Downloads are available in JPG and PNG. The assets use the Creative Commons CC0 1.0 Universal license, permitting copying, changes, distribution, and commercial use without permission, and attribution is not required. You can browse and download on the website or use the API to search and download assets with code; its documentation lists v1, v2, and v3 endpoints. The creator cautions that the API may not be stable or reliable enough for enterprise applications. Documentation also covers use with Blender's Asset Browser. Patreon supporters may receive early access and easier batch downloads, and the homepage mentions ad-free browsing. Access to downloadable assets is free at free.

FreePBRTextures is a web library of free, seamless physically based rendering materials for game developers, 3D artists and designers. Its homepage lists more than 30 textures across eight categories, each generated at 4K resolution, or 4096 by 4096 pixels. Every texture includes albedo, normal and roughness maps. Procedural generation uses mathematical noise functions, with wrapped coordinates producing tileable edges; a seed recreates the same result, while changing seeds and parameters makes variations. The site also describes combining AI image generation with procedural post-processing. The textures are released under CC0, which permits commercial use, modification and redistribution without attribution. Blender and Unity workflows can use the albedo, normal and roughness maps; a guide for Unreal Engine 5 also uses metallic maps. The free plan costs nothing and requires no signup. Files are provided in PNG and ZIP formats. The terms page describes itself as template terms and advises customization and legal review.