K-3D vs Plask Motion

K-3D is free desktop software for 3D modeling and animation on Linux, macOS, and Windows. It supports procedural and parametric workflows, with interactive property changes and immediate results. A node-based visualization pipeline connects components and passes selections between modifiers. An undo tree supports both undo and redo operations. The site describes native RenderMan support within the K-3D interface, plus real-time mirroring and welding of one side of a model into a subdivision surface. Source code is released under the GNU General Public License. Downloads include macOS, Windows, and source code; development information also lists GNU/Linux, MacOS X, FreeBSD, Microsoft Windows, and other build platforms. Optional build integrations include Collada, DBus, GLX, Gnome VFS, GTS, ImageMagick, ODE, OpenCASCADE, and OpenEXR. Documentation is provided through an archived wiki, with forums, a development mailing list, and issue submission for support.

Plask Motion turns video into 3D animation using AI motion capture, without suits or sensors. Its single-camera capture extracts body movement that users can apply to an imported 3D character. MMD and VRM models support blinking and physics. The product also renders video with automated camera and lighting controls and customizable effects, and exports FBX, GLB, and BVH. Listed workflows cover Blender, Unreal Engine 4 and 5, iClone, After Effects, MetaHuman, VRoid, Cinema 4D, and Ready Player Me. Scene sharing and realtime collaboration are listed for all three plans. Plask recommends horizontal video at 720p or higher; it accepts MP4 and WebM files up to 100 MB and from 3 seconds to 5 minutes long. Multi-person capture is recommended for fewer than 10 people and limited to under one minute and 1,800 frames. The software recognizes human forms, not non-human objects for animation. A free plan is listed; Standard and Pro offer a 7-day trial. Standard is $216 a year and Pro is $600 a year.