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RED-BLUE 3D Images

Author: White Knight

Tools Needed

  • Photoshop
  • Bryce
  • Red-Blue Glasses

Support Files

Introduction

You will need a pair of RED-BLUE lens glasses to view the Images created by this process.

Here is the URL for a good Quality set of Glasses

3D Glasses

Create a scene in Bryce, or your Favorite rendering program.

Get a good Camera Position and save it using one of the Camera Dots.

Render this image and save it as RightEye.

Open the Camera Control and change the camera Settings.

Adjust the X position more Positive (.1 to 2.0 ) depends on distance from the subject

Save this camera Position to a camera Dot

Render this Image and save it as LeftEye.

By shifting the Camera position along the X axis, you have created slight change in the Camera location and also the perspective of the Image.

These two perspectives will be used as the right eye view, and the left eye view, and combined into or 3D Red-Blue image as described in the Photo Shop portion below.

You will need a pair of RED-BLUE lens glasses to view the Images created by this process.

RED Lens over the Left Eye, and BLUE Lens over the Right Eye.

Two Support Files, One is the Left Eye image, and the other is the Right Eye image

Step 1 - Create and Render a Left Eye View and Right Eye View

400-0231.jpg

Open Photoshop.

Image Mode must be RGB For this to work.

(note: Not all color images will work. Gray Scale Images work Best)

(Convert each image to grayscale, then convert back to RGB, the image will still be shades of Gray, but there will be Separate Red, Green and Blue Channels to work with.)

Open the Left and Right Images.

Select the Left Image, Copy the Whole Image.

Open a New Image.

Switch to the default colors for Foreground and Background (black / white)

Paste the Copy of the Left image into Layer 1 of the New Image.

Close the Left image.

Select the Right Image, Copy the Whole Image.

Paste the Copy of the Right image into Layer 2 of the New Image.

Close the Right image.

Select Layer 1 or the Left Image.

400-0232.jpg

Step 2 - Make the Left Eye Image RED

400-0233.jpg

Layer 1 is selected.

Layer 2 is turned off.

Then the Channel Pallet is selected.

The RED Channel is then selected.

Ctrl-A to select the whole Channel, then press Delete.

(note: the Default Foregraound and Background colors must be set to Black and White for this to work)

The RED Channel of the Left Image is Erased (filled with White), Leaving only the Blue and Green Channels intact.

Now Select the RGB channel. This Image should be very Red.

Then go back to the Layers Pallet.

Step 3 - Make the Right Eye IMage BLUE

Layer 2 is selected.

Layer 1 is Hidden.

The Select the Channels Pallet.

Select the Blue Channel and Erase or Fill it with White.

Select the Green Channel and Erase or Fill it with White.

This leavs only the RED channel intact.

400-0236.jpg

Now Select the RGB channel. This Image should be very Blue-Green.

Select the Layers Channel Again.

Step 4 - Multiply, Multiply, Multiply....

400-0237.jpg

Un-Hide Layer 1, but make Sure Layer 2 is currently selected.

Change the Blending Mode of Layer 2 to MULTIPLY. This will combine the Red and Blue Images.

400-0238.jpg

Now is the Time to Put on your RED-BLUE Glasses.

RED Lense over the LEFT eye, BLUE Lens over the RIGHT eye.

You Should now See your 3D image pop out at you.

We will now fix and adjust the image in the next step.

Step 5 - Fix and Adjust - It

400-0239.jpg

When you View the Image with the Red Blue glasses, each eye will only see the filtered image for that eye, creating the effect of 3D.

If the Camera Position was shifted too far along the X Axis when the images were rendered, then the Separation between the RED and BLUE images Might be too Great, Causing Eye Strain to see the 3D effect.

This is Fixed very easily, by Selecting either Layer 1 or Layer 2, and then using the Nudge Tool.

Nudge the Whole layer Left or Right to Decrease the Amount of Separation.

This adjustment is best Done While Wearing your Red-Blue Glasses, so you can tell when the 3D effect POPS into View.

400-023a.jpg

Once you are Happy with the 3D effect, you can Flatten the Image, Crop it to Remove any Blue or Red Fringes on the Sides, and then Save it.

Important: Only Nudge or shift to the LEFT or RIGHT, Never Nudge or Shift UP and DOWN.

Step 6 - The Finished 3D Image

400-023b.jpg

The Whole 3D effect is Controlled by the Amount of Shift Left or Right between the Red and Blue images.

The More the RED is shifted to the Left, the More the Image will Seem to Jump Off of the Screen, or the closer to you it will appear.

The More the RED is shifted to the Right, the More the Image will Seem to Sink into the Screen , or the Further away from you it will appear.

Most 3D effects are best viewed when the red is left shifted so the image appears to pop out from the screen.

Step 7 - 3D Primer

400-023c.jpg

A brief primer on how the RED-BLUE process works.

Our Brain Processes Two Separate Images, one from Each Eye, to Give us Depth Perception. If you Focus on a Point on a Wall or an Object, and then Close one eye, and then Open and Close the Other Eye, the Image you See will seem to Shift slightly from Left to Right. This is because Each Eye, has a slightly different Line of Sight to the Object.

Eyes are spaced 2 to 3 inches apart. If you draw a straight line from each eye to the object you are focusing on, there will be two different Paths, or Lines of sight to that object.

Now Pretend to Place a flat Screen between you and the Object. The Lines of Sight from each Eye will Intersect this Flat Screen at Two Different Points. If we Color the Left Eye's Point Red, and we Color the Right Eye's Point Blue, we will Have a Separate RED and BLUE Point, for any given Focus Point in our Line of Sight.

If we are to Move or Scan our Line of Sight in a Horizontal Line from one side of the Screen to the Other, and Create a MAP of all of the RED and BLUE Points, we would have a single SCAN LINE for our Image.

Areas where the RED and BLUE colors intersect or overlap, must be Blended. The exact Shade or intensity of RED and BLUE is determined by the Color of the Focus Point, or the Shade of Gray of the Focus Point.

Repeat this same Horizontal Scan Process for each Vertical step, in our image, and we can combine all of these Horizontal Scan Lines into one Image.

This is the Reason why, we can only Shift the RED and BLUE separation Left or Right. We are only changing the Horizontal Scan Line. If we shifted the RED and BLUE up or Down, we would Distort the Image beyond recognition. Not to mention give our self a Headache. The same thing happens if the Amount of separation becomes to great.

Our eyes try to Cross Focus, and can cause a headache.

See the Sample Drawing for a Visual diagram of the Above description.

In the Diagram, the Separation has be greatly exaggerated, the red lines show the left eye line of sight, and the blue lines show the right eye line of sight.