ambientCG vs SketchUp Texture Club

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.

SketchUp Texture Club is a portal for finding material textures used in graphic design, visual effects, computer games, and other image-based work. Its emphasis is visualization and rendering for architecture and interior design, with resources for students, professionals, and people learning 3D visualization. The library is divided into architecture, materials, nature elements, and backgrounds and landscapes. Users can search, browse categories, view enlarged previews, save favorites, and filter categories to show only PBR textures with maps. A free account permits up to 15 low- and medium-resolution downloads per day, though some textures are unavailable. Club Member costs $17 a year and allows up to 50 high-resolution texture downloads per day, mapped textures where available, and unlimited daily 3D model downloads. Files come as compressed.RAR archives; the site names WinRAR for Windows and The Unarchiver for Mac. Textures can be used commercially without royalties or usage fees, but cannot be resold or redistributed as a competing product, and some rendering uses are restricted. The nonprofit portal is managed by Image Promotion Association.