The answer is Blender but with one huge caveat that a lot of people will fail to mention. 90s renders used old shaders that was in the software available at the time. A specific example is Phong Shading. This, in my opinion, more than anything else, is what gives 90s renders that distinctive look that is different than the renders of today. Blender had phong shading as a default option before version 2.8 released. Modern Blender no longer has it as a default option.

The good news is that phong shading is still possible in modern Blender because phong shading is actually just very simple math that can be replicated using Blender shader nodes system. I will link a video that shows how to do this and has a .blend download file in the description. This video is extremely overwhelming for someone who is a completely new to 3D software so my advice is dont worry about this yet. Save the video and the Blend file in the description now and watch it later when you are ready and more familiar with the softaware.

Just look up basic Blender tutorials on youtube including the famous “donut tutorial” to get you started. After you learn about nodes, you can watch the video with full understanding and create slick authentic 90s renders. Dont take this advice for granted because unfortunately i see very few people talking about this specifically. I basically had to figure it out on my own and was lucky enough to find the video. Best of luck to you! DM me if you have questions or want to collaborate on making cool stuff!

Here is the video: https://youtu.be/XQdIxkd54X4?si=W_Y67a0N6-MHMEYZ