Compilation of useful resources for 3D rendering and graphical presentation for architecture students and professionals alike. I have compiled these for my own convenience and posted for the sake of sharing only. I have been using a few of these websites from time to time however I cannot guarantee any safety, quality, and price issue, I suggest just check on your own.

My usual go-to websites for downloading 3D models

https://3dwarehouse.sketchup.com/
https://www.revitcity.com/

Architectural 3D Models for 3Ds Max

http://archive3d.net/
http://artist-3d.com/
http://www.3dmodelfree.com/

Other 3D Models for animation

http://tf3dm.com/
http://artist-3d.com/
http://www.creativecrash.com/
http://www.3dmodelfree.com/
http://www.sharecg.com/

Engineering-specific Models

http://www.3dcontentcentral.com

Compilations of 3D model resources and textures from other websites

https://blog.enscape3d.com/free-resources-for-architectural-projects
https://www.hongkiat.com/blog/60-excellent-free-3d-model-websites/

Sketchup plug-ins

http://www.cad-addict.com/2009/07/sketchup-list-of-plugins.html
https://sketchucation.com/forums/viewtopic.php?f=323&t=28782

Images for entourage

http://www.escalalatina.com/ (People)
http://www.nonscandinavia.com/ (People)
https://xoio-air.de/2013/cutout-people-high-above/ (People)
https://www.mrcutout.com/ (Varies)
https://pngscreativos.wordpress.com/ (Varies)

Hope you find these useful as well. Please let me know if there are unsafe, dead links, or want to contribute to this list as well. Thanks and happy rendering!
_{Updated 26 May 2020}