In a new file, press A on the keyboard to select all default objects. Press Del key to delete them.
How to Create a Portal Door in Blender
In the 3D viewport, press Shift-A and add a Mesh > Cylinder.
In the tool shelf, select Nothing for Cap Fill Type. This will
remove the end caps of the cylinder.
With the object selected, press Tab to enter edit mode.
Press A to select all
vertices, if not already selected.
Press R on the keyboard, then X and then
to rotate the cylinder 90 degrees in X axis.
Press 3 in the number pad to get into side view.
Press S, then Y and then move the
mouse to scale down the cylinder along the Y axis.
Primary-click to confirm. Press
Tab to exit the edit
With the object selected, click on the Particle button in the properties
window and press the New button.
Press Alt-A to play the animation with the default particle setup.
In the Emission panel, increase the Number to 25000 so that we
have more particles.
Reduce Lifetime to 15. This determines the
life span of particles in frames. The Start value is the frame number
from which the mesh starts emitting the particles and the End value determines at what frame to stop.
I’ll use the default value for Start and End.
Scroll down and in the Fields Weights panel, reduce the Gravity to
that there is no gravity to pull the particles down. Press Alt-A and preview the
You will notice that the particles are very symmetric. Scroll back to the
Emission panel and increase the Random value to 1. This will
give some irregularity and randomness to the particles.
Press Alt-A to
preview the changes.
Press Tab to exit edit mode. Press Shift-A and add Force
Field > Vortex.
Secondary-click on the vortex to select it.
Press R then X and then type
rotate the vortex force field 90 degrees in the X axis.
The idea is to make it
facing the same direction as the cylinder object. Press S and move the mouse to
scale it down.
Primary-click to confirm. This is just to have a better view of the
With the vortex selected, click on the Physics button in the properties
In the Force Fields panel, select Point for Shape. This determines the
vortex force to go inwards or outwards. Increase the Strength value to around
25. The higher the number, the faster will be the spin.
Increase the Flow to
This will set the distance to which the force field will effect the particles.
Press Alt-A for preview. Try different value to see the difference.
Press Esc to stop the animation.
Hold Shift and then secondary-click on the
vortex object first and then the cylinder to select them both.
Press Ctrl-P and
in the Set Parent To menu, select Object. This will make the cylinder parent
to the vortex.
Moving, rotating or
scaling the parent will also affect the child object. Now you can move the
portal setup anywhere just by moving the cylinder.
Add a ground or floor. Press Shift-A and add a Mesh > Plane.
With the plane selected, press Tab to enter edit mode. Press A to select all
vertices. Press S and move the mouse to scale the plane. Primary-click to confirm.
Press Tab again to exit edit mode.
Secondary-click on the cylinder and press G to move it upwards.
You can also use
the arrow manipulators to move the object. The vortex object will automatically
follow the cylinder as it is now a child of the cylinder.
Press 1 in the numpad to get into front view. Press Alt-A to preview the
animation. You will see that the plane does not interact with the particles.
Press Esc to stop the animation. Secondary-click on the plane to select it.
on the Physics button in the Properties window and press the Collision button.
Press Shift-right arrow to go to first frame.
Press Alt-A to preview the
animation. You will se that the particles are now colliding with the plane.
Press Shift-A andCamera.
Press 3 in the number pad to get into side view. Press G to move or use the arrow manipulators to
move the camera away from the cylinder.
Also place it a bit higher from the
Press the Ins button or the 0 button in the number pad to get into camera
view. You can check the placement of the camera.
Scrub the timeline forward to around 100 frames. Press F12 to render an image.
You’ll see that the particles are rendered as white halos.
To change this you need to assign new material to the particles which can be
rendered in the Cycles Render Engine.
In the header of the 3D viewport,
click on the Engine drop down list and select Cycles Render.
Press F12 to render an image and you will notice that the particles are not
appearing. I’ll create another object, assign some material to it, and then
tell blender to render the particles as that object.
Press Esc to get back to 3D viewport. Press Shift-A and add Mesh > Ico Sphere.
In the tool shelf, reduce the Subdivisions to 1.
In the Tools tab and in the the Edit panel, set the Shading to
With the Icosphere selected, press G and move the sphere below the plane so
that it is not visible in the shot. Press S and scale it down.
Right click on the cylinder to select it. Press the Particles button in the Properties window. In the Render panel,
- Uncheck Emitter. The cylinder object will not render
- Press the Object button
- Select the Icosphere in the Dupli Object drop down list. The particles
will be shown and rendered as this object.
- Set the size according to your preference. I like it to be very very
Press F12 to render and see the result. You can now see the object appearing
in place of the particles.
Secondary-click on the Icosphere to select it. Click on the Material button in
the properties window and press the New button.
In the Surface panel, select Emission for Surface. This
will make the material emit light. Increase the Strength
to 10 to increase the intensity of the light.
Press F12 to render and see the result.
Click on the colour bar and change the default white colour to light orange.
Press F12 to render an image. Play with the colour and strength settings. The
Portal door is almost done.
I would like to preview the animation in a dark background. Click on the
World settings button in the properties window.
In the Surface panel, press the
Use Nodes button. Click on the colour bar and set it to dark grey.
Press F12 to render the image.
Click on the Camera (Render) button in the Properties window to open up
Check the Motion Blur tick box. Press F12 to
render and you will see that it adds a
nice motion blur effect according to the movement and direction of the particles.
In the Sampling panel, increase the Render samples to 250 or 500. This will
reduce the noise in the final rendered image or video.
The portal door is now ready and can be used in your animations. You can now render a test video.
- In the Output panel, click on the folder button and set the final output
destination and name of the video file
- Select MPEG in format type drop down list
- In the Encoding panel, Set Format to MPEG-4 and Codec to
- You can set the resolution of the video or image in the Dimensions
- Finally press the Animation button in the Render panel
Locate the rendered animation and play to see the result:
In the particles properties, and under the Velocity panel, increase
the Random value to 2 or 3. This will add some randomness and irregularity to the inner border of the portal.
Experiment and play with different values for Life and Number of
particles under the Emission panel.