Lenticular sheet can be purchase online from microlens.com at about $5.00 per piece. In this tutorial we assume you will use the 8" x 10" 40 LPI lenticular sheet. We further assume that only two pictures will be taken. If you use LPI other than 40 and if you want to take more pictures to make the final image less sensitive to horizontal head movement then please refer to the original tutorial in the 3D Lenticular Printing Tutorial section of vicgi.com
Step 1: Take Two Pictures With Binocular Disparity
Refer to the instructable on how to make a track for the camera to move horizontally, https://www.instructables.com/id/Stereo-Photography-Track-quick-and-dirty .
You can also purchase the slider bar for about $100 from http://www.stereoscopy.com/jasper/slide-bars.html.
Alternatively, just tie the camera on a die-cast model car and move it along a straight line.
If you just want to do it as an exercise, you can download the two high resolution pictures in this step.
Step 2: Find the Key Plane of Lenticular Picture
Now make the decision which will be the focal plane. A focal plane is the plane that does not have parallax. In other word the left and right eyes will be seeing the same image on the focal plane.
If you choose the foreground as the key plane, everything behind the foreground will go into inside of the lenticular picture. If you choose the middle-ground as focal plane, the foreground will pop out of the picture and the background will go into the picture. If you choose the background as the focal plane, the middle-ground and the foreground will pop out of the picture with the foreground being closer to your eyes.
Step 3: Align a Common Point on the Key Plane
Open both picture in Photoshop. Copy and paste the right picture on top of the left picture. Adjust the [Opacity] of the right picture to about 50% so you can see through it and the left picture below it.
Now choose the [Move] tool from the tool bar and then press the [Right] arrow on the keyboard multiple times so that the most forefront table legs overlap.
You can adjust the [Opacity] of the right image back to 100% now.
Step 4: Crop the Image to Account for the Shift During Alignment
Step 5: Resize the Image
Once the resolution is adjusted, resize the width or height so they will match the size of the lenticular sheet you have.
Step 6: Create a Mask for the Left and Right Image
Step 7: Interlace Each Image With the Mask Created
Create a mask for each of the layers by clicking the little [Mask] button on the [Layer] palette, i.e. the third one from the left.
Bring up the [Channel] palette and highlight the mask layer under [Channel]. Paste the left patten we did in the previous step over to the mask layer.
Highlight the right layer on the [Layer] palette. Repeat the same for the right layer, i.e. paste the pattern for the right layer, the one starts with black stripe, to the mask layer under [Channel].
If your lenticular sheet has adhesive backing then you will need to use a cold laminator to do the lamination. If it doesn't have adhesive backing then try to tape it in position.
Voila! Your 3D DIY lenticular print is done.
As you can see making a single sheet of lenticular print is very tedious. If you need volume mass production you should consider hire a lenticular printing company to do it.