Once complete, the shader will be available for download.
Have a look at this incredibly realistic DVD shader created by 3D Artist and Animator, known only as SUPRA3D, using Blender, a free and open-source 3D modeling, texturing, rendering, animation, and VFX software.
Complete with realistic-looking scratches and smudges, the shader is currently WIP, with the author noting that it still requires some polishing. According to SUPRA3D, the goal was to make a true-to-life shader, and while it is "still not 100% physically accurate, that just comes down to the limitations of Blender". Once the shader is fully complete, the creator plans to make it available for download via Gumroad.
If you would like to learn more about creating shaders with Blender, we highly recommend checking out last year's 80 Level Digest on the topic, featuring several informative tutorials on making complex shaders with Blender.
And here are some great guides that will help you learn the basics of shading in Blender: