This page is out of date but is being gradually updated for Seamless3d III.
Seamless3d is a fast efficient 3D Modeller/Animator that is less in size to download
than Flash. Its ideal for making
high quality animated movies, optimizing models for real time graphics and lets you log into the Seamless3d chat server to chat and show your work to fellow Seamless3d modellers.
Beginner Friendly Design
Fast Click Skeleton Creation
New bones can now be added very quickly by clicking in the 3d window while holding down the right control key. New
bones can also be inserted between 2 joints by clicking on the line that joins them.
To see the this feature being used watch the Nurbs
Lathe Robot Demo
Sphere, Cylinder, Cone, Torus, Box,
Rectangle, NurbsLathe and BendyLathe Objects
Geometry can easily be added to the skeleton's bones by simply selecting the
bone in the Scene Tree window and clicking on any of the following buttons in the
The object's control panel allows you to easily change the object's dimensions
and position and orientate it. NurbsLathe's and BendyLathe object's shapes can
easily be modified by dragging control points in the 3d window.
Convert to NurbsPatch
Sphere, Cylinder, Cone, Torus, Box, NurbsLathe and BendyLathe objects can easily be converted to NurbsPatches
by right clicking on the object's icon in the scene tree window. and selecting
This offers a lot of freedom to the beginner to control the
Intuitive Animation Bar
To animate, all the user has to do is plug an Anim bar into the scene node, click
on the Anim node to put seamless into Anim mode and pose the model at different
points in the time line.
Robot Demonstration Help
The Seamless3d Robot Demos simulate a user using seamless3d. The demos are
broken down into operations. The operations can be played in any order and
repeated as many times as needed. All of the clicks and keys used are displayed
in the status bar. Because the demos are simulations not movies, you are
guaranteed nothing is ignored to complete the task. The demos can be selected by
and then selecting help
Multiple Control Point Selection & Manipulation
Multiple control points
from any number of patches can be selected by dragging with the mouse while the
left shift key is held down. Once selected you can:
- Translate (move): drag one of the selected points
- Rotate 1D: Drag the orientation lever
- Stretch/Squash 1D and Rotate: Control Shift while dragging the orientation lever
- Stretch/Squash 1D: Alt while dragging the orientation lever
- Stretch/Squash 2D: Alt Control while dragging the orientation lever
- Stretch/Squash 3D: Alt while dragging one of the selected control points
- Orientation lever in neutral: Control while dragging the orientation lever
There is also the option of manipulating the selected control points using a control panel which can be opened by pressing
Selected control points can be un-selected
the same way they are selected by holding down both the left control and shift
To see multiple control point editing
being utilised see the YouTube tutorial:
Making & Importing a Suit Tutorial Part 1 of 2
Making & Importing a Suit Tutorial Part 2 of 2
NURBS Control Ring Selection & Manipulation
When selecting multiple control points it is often necessary to select all the
points in one or more rings within a patch. Whole rings can be slected by
clicking on only one of the control points within the ring. See the tutorial:
Selecting & Manipulating NURBS Control Rings
The radial tug lets you tug multiple control points at a time and have the
amount each control point is tugged within a specified radius vary depending on
how close they are to the center of the tug so that there is always a smooth
transition to the unaffected control points.
To use the radial tug first select a NurbsPatch in the scene tree window and establish a radius by clicking up on this button:
from the toolbar.
When the radius is visible you can also resize the radius by dragging the control point located to the right on the radius (the red dot located on the cyan coloured circle)
A NurbsPatch can be set to mirror another patch (for example a left arm mirror a right arm) or so that
its left side mirrors its own right side.
Nurbs patches can be stitched together using control polygons to create complex structures.
Once the patches are stitched they are as straight forward as single
patches to modify the shape (just drag the control points).
NURBS Surface Poly Editing (NSPE)
NSPE allows the user to hand edit the polygons on NURBS surfaces. This includes being able to drag the vertices anywhere along the NURBS surface as well as join the vertices together, break the vertices apart and colour them. NSPE has a significant advantage over simply converting a NURBS surface to a polygon mesh for editing because NSPE lets the user be able continue to modify the NURBS surface for the hand edited polygon structure.
Because NSPE ensures that when a polygon's vertex is dragged it will always be on the NURBS surface, NSPE greatly helps the user to avoid unintentionally changing the shape of the model when optimizing for real time animation
Fusing NURBS Surfaces
Fusing patches has some advantages over stitching, you don’t have to concern yourself with the number of control points matching up with the patch you are fusing it to but fused surfaces are not as straight forward to modify after they are fused and fused
patches are less suited than stitched patches for nurbs control point animation.
Show/Hide Patch Control Cage
When nurbs modelling, it can be extremely helpful to only show the control cages for patches that you are working on. This does not hide the geometry like when you hide a part node, only the control cage is hidden and made inactive from modelling.
A Patch can be toggled from showing or hidden by double clicking on the patch's icon in the scene tree.
You can show all NurbsPatch control cages by pressing Alt A
Hide all patch cages except the selected patch by pressing Alt S
Hide any patch cage that has one of its control points selected by pressing Alt H
Multiple Vertex Selection & Manipulation
A vertex can be modified by simply clicking on it and dragging it. Multiple vertices can be selected for dragging by selecting them first.
Multiple vertices are selected using the rectangle section tool by dragging with the left shift key held down.
Multiple Triangle Selection & Manipulation
Multiple triangles can be selected much the same way vertices can be by holding down the
shift key. Once the triangles are selected they can be
deleted, cut away from selected triangles or coloured as shown in
the tutorial/demo: Breaking, Joining and Colouring Polygons
being able to split selected strips of triangles, box modelling can be performed
as shown in the robot demo: poly model avatar demo
The radial tug lets you tug multiple vertices at a time and have the amount each control point is tugged within a specified radius vary depending on how close they are to the centre of the tug so that there is always a smooth transition to the unaffected vertices.
To see the radial tug in action watch the
poly radial tug demo
A part can be set to mirror another part (for example a left arm mirror a right arm) or so that its left side mirrors its own right side
(for example a head part).
A triangle’s vertex can be joined to another by simply dragging the vertex to the destination vertex and then pressing J.
Many more options are available for how a vertex may be joined to another as
shown in the tutorial/demo: Breaking, Joining and Colouring Polygons
Colour Coded Ownership and Weight Painting
Seamless models can easily be rigged for animation by painting the nurbs control
points (or vertices in the case of skinning) with colour coded ownership and
NURBS Control Point Animation & Morphing
a nurbs model is easily animated by posing it at different points on the Anim
bar's time line. The poses are automatically captured for playback. Morphing is also straight forward, you just have to drag a control point and the Anim bar will capture it for playback as shown in
Skinning and Poly Morphing
a poly model is easily animated by posing it at different points on the Anim
bar's time line. The poses are automatically captured for playback. Morphing is also straight forward, you just have to drag a
vertex and the Anim bar will capture it for playback as shown in the video:
The morphing nodes can be output to HAnimDisplacer nodes when output to vrml/x3d.
When outputting poly morph animation to vrml or x3d make sure genHAnimNodes
fields are ticked.
Inverse Kinematics (IK)
When I tried creating a walk animation late last year (Dec 2010), I could see it
was going to be a constant battle stopping the feet from sliding about when they
are meant to be firmly engaged on the ground and so decided to add an intuitive IK
interface to seamless. Seamless has had IK years ago
in the form of the AnimByAnkle node which used hoppy technology but the new IK
Interface is greatly improved with draggable IK control points making it friendly
even for a beginner. IK should be good not just for walking but also dancing,
acrobatics, climbing etc.. For how to utilise IK see the new Robot
Demo/Tutorial Introduction to Inverse
Forward Kinematics (FK) Blend
When developing IK and experimenting with it by creating a walk cycle for Lucy, I realised that I wanted the knees straight much of the time in the cycle but found IK hard to control when the knee joints are close to being straight (no bend). This lead to developing the FK blend feature.
The 2 fields (which belong to the part node) used for blending are fka
(FK angle) and
For more info and how to utilise FK Blend, see the tutorial:
Advanced Inverse Kinematics
The FK blend helped keep the knees steady at specific points in the walk cycle but then I noticed there was a problem with the ankles sinking into the ground and rising above it at times. I found I had to add a number of key frames to adjust the pelvis to compensate. This lead to the development of the
node which fixed the problem without the need to add extra key frames. The PosCompensator simply compares the ankle position at the beginning of a compensation period with the position of the ankle there after in that period and adjusts the pelvis with the difference.
For more info and how to utilise the PosCompensator, see the tutorial:
Advanced Inverse Kinematics
mode lets you see all of the pivot points at once and how they are connected via lines. These points and lines form a visual skeleton and can be seen regardless of being in wireframe mode or not.
Mode lets you drag any of the pivot points in the 3D window.
This feature lets you translate and/or rotate an animation.
See tutorial Transform Animation tutorial
Default Pose conversion
When importing an animation into an avatar, a common problem encountered will be that the default pose for the animation will not match the default pose for the avatar. For example compare the default poses for Zoe and Lucy:
Because the angle of the arms are different for the 2 avatars, if we import an animation from one to the other we will see bizarre results from the arms when they animate.
We can solve this problem by recalculating the avatar's default pose before importing its animations.
See the tutorial: Recalculating an Animation to Match a Default Pose
NURBS Defined Paths
The NurbsTrack node lets you specify a path for a part to travel using a nurbs
curve. This feature can be used for animating objects like cars, trains,
aeroplanes etc. and for animating IK control points. One of the interesting things about this kind of animation, is you can modify your animation while the anim bar is playing.
For how to use this new exciting and friendly animation aid, see
Following a Curvy NURBS Path for Animation
Video Synchronization Animation Aid
Using real time video as a guide has proven itself in my lip synching animations.
Much of the work in synchronizing my avatar to a real life video of myself speaking involved a lot of work going back and forth from a video player to seamless and
manually calculating points in time.
By making it so that the video can play inside 2.167 the synchronization of the video to the Anim bar is
now taken care of by seamless. See the tutorial: Synchronizing
the Anim Bar to Real Life Video
Animations can be imported from a smls (or a bvh file) file into another smls file as shown in the tutorial:
Importing Gesture Animations
Palette Control Panel
Seamless3d supports colour per vertex for both poly and NURBS modelling.
Colouring vertices is generally much easier than texturing so is ideal for
The Palette Control Panel allows the artist to select and mix colours.
The video Modelling a Face From a Pre-Stitched Patches
shows how vertices can be coloured in nurbs modelling.
The Nurbs Lathe Avatar
tutorial/demo shows how nurbs lathes can be coloured.
The Breaking, Joining and Colouring Polygons
shows how vertices can be coloured in poly modelling.
ColorSweep nodes let you colour a section of vertices with the colour gradually
changing from one colour to another.
A ColorSweep node can
colour poly-maps before the triangles are mounded into shape. The following image
is an example of this:
A ColorSweep can also colour the triangles after the triangles
have been curved into shape. This makes it easy to create the following effect
for a landscapes:
jpeg png and bmp image files supported.
Nurbs makes texture mapping easy.
Coloured Poly-Map to Texture Conversion
Because seamless's nurbs polymaps are much like a texture map in that they are made up of 2D coordinates within the space of a 1 unit square,
Seamless can easily convert the colours in a polymap to a texture. This feature
in effect allows you to create textures in 3d space, by using NSPE to create the
Because Seamless3d supports FFmpeg it is very easy to convert animations to movie files
as shown in the tutorial: Making Movies
You can quickly make movies from screen shots or by
ray tracing via POV-Ray. Seamless3d has specialised fields for setting Pov-Ray
lights adnd materials. See the tutorial:
Rendering the Frames Using POV-Ray
You can create AVI, MPG, MP4 and FLV movie formats by clicking the
appropriate check box for export. By manually instructing FFmpeg many more
options are avilable.
Import and Export Formats
Import & Export BVH Motion Capture Files
Seamless3d can export animations to BVH by right clicking on the Anim bar and selecting export to bvh.
BVH files can be opened just as easily as opening native smls files
and so Seamless3d can be used as a quick BVH file viewer. When bvh files are
opened the same way as opening native files, Seamless3d creates a simple nurbs
lathe avatar from the BVH joints. By simply doing a "Save As" you can quickly
convert bvh to smls.
BVH files can also be
imported as gestures into existing models
load Sphere, Box, Cylinder, Cone and IndexedFaceSets and rendered in real time
and can also be converted to native Seamless
Textures and colour per vertex is supported.
TimeSensor and Interpolator nodes and ROUTEs can be imported and converted to
native Anim nodes and scripts.
Import X3D VRML Classic Encoding
well as being able to import VRML97 nodes, X3D H-Anim and IndexedTriangleSet nodes can be
imported and converted too native Seamless nodes.
Export VRML & X3D
Export for both X3D VRML classic and XML encoding is supported.
Export & Import H-Anim
When exporting Skinned models to H-Anim, native Part nodes are converted to
HAnimJoint nodes and when exporting poly morphing, CPMorpher nodes are exported
to HAnimDisplacer nodes.
HAnim joints nodes can be imported and converted to native Part nodes. See
tutorial: Import HAnim Avatar
Import Blaxxun Avatar Studio
Seamless3d can import avatars from Blaxxun/Canal Avatar studio. The mesh, texture maps and gesture animations will all import. See tutorial:
See tutorial: Importing Blaxxun Avatar Studio Avatars
When outputting obj, normals and texture maps are exported.
Synthesizing Sounds Using NURBS
This feature is currently being redesigned to make it easier to synthesize
sounds including speech.
For more info see: Seamless3d modelling Language
Because Seamless3d is open source software with very few restrictions on the
licence (less restrictions than the LGPL) and is a small compact program, you can
easily compile your own scripts to be part of Seamless3d. This lets you use Seamless3d
as a base for developing all sorts of stand alone 3d applications including
games with few if any restrictions. See tutorial:
Bind Nodes from a .smls/.wrl file to the Source Code for Seamless3d
Worlds & Avatars
Chat with friends in 3d using the seamless3d modeler as the
You can use public avatars or make your own with very few if any restrictions on
your artistic freedom.
You can visit worlds already made by others or make your own worlds.
Because seamless chat is open source software under the MIT license (both server and client), the technology is not at the mercy of any single commercial or non commercial organization, is immune from bankruptcy and offers freedom to both commerce and the non commercial artist.
Gesture Animations can be triggered by key words used in speech or by specifying gesture commands.
Events like starting a train for example can be shared by all in the world when it happens.
Text to Speech (TTS)
The TTS version of Seamless3d utilises Windows' built in SAPI5 TTS speech engine for chat. Different voices can be specified for your avatar.
Like the Seamless3d modeller/client, the seamless chat server is freely available
for all under the MIT licence. If you have the means of being able to run a
server from your computer you can run the seamless server from your computer.
See tutorials: Running the Seamless3d Server from your computer
[3d Modelling Software]