You can check out the latest Nuke 15 features to compare this classic build with today's machine-learning-driven workflows. Nuke 6.3v4 Release Notes Summary | PDF | Software Bug
Significant upgrades to the Planar Tracker made rotoscoping and surface tracking much faster, while a new Denoise algorithm provided cleaner results for grainy film plates. The foundry nuke 6.3v4 x32 x64 win
Released during a pivotal time for VFX, Nuke 6.3v4 was a stable workhorse for compositors transitioning into the world of high-complexity 3D workflows. While modern versions have added AI and GPU acceleration, the 6.3 era laid the foundational "3D-centric" approach that Nuke is known for today. You can check out the latest Nuke 15