Know those gift cards, bookmarks, and other small cards that are covered in that plastic full of ridges that makes a cool noise when you run your fingernail across it and that you can see one image in and then tilt slightly and see another? That's an example of lenticular printing! Those things used to hold a magical charm for me and I even got to make one out of paper in elementary school. Fast forward a few years and I'm still making them but with Lego bricks instead.
The element that makes these possible is a little 1x1 sloped piece that is commonly referred to as a cheese slope. You'll need quite a few of these to make the heart/rainbow seen here but it shouldn't been too hard to get the pieces because any sets that come with any cheese slopes will always come with a few extra.
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Step 1: The Parts
To make a Lenticular Lego model of your own, you will need parts for the fun picture part and parts for the baseplate part.
For the action part you will need:
-red cheese slopes*
-white cheese slopes*
-light gray cheese slopes*
-blue cheese slopes*
-red cheese slopes*
-black cheese slopes*
-4 1x tiles
-2 1x tiles
-22 1x2 plates
For the baseplate:
-enough plates and/or bricks to make a double layer 8x16 rectangle
The second picture shows the white plates and tan bricks that I used to make the base.
*See Steps 4 and 5 for the parts breakdown of each image.
Step 2: The Base
Unless if you happen to have an 8x16 baseplate or have cut one to size, you will have to make to make one yourself. You'll need to stack two layers so that your baseplate stays together. You can use any combination of plates and/or bricks that you like but plates usually come in larger sizes so working with those can be easier.
I made a base out of a layer of tan bricks and white plates. I included the pictures to show how I assembled mine but this is just how I did it; as long as you end up with an 8x16 base you're good.
Step 3: The Frame
Construct an 8x16 frame using the 1x6 and 1x8 tiles and the 1x2 plates.
The 1x6 tiles go on the short side and two each of the 1x8s make up the top and bottom of the frame. Connect the tiles with the 1x2s then fill in with the rest. Attach on top of the baseplate.
Step 4: The Rainbow
Now it's time to work on the rainbow image. Lay down the first row of cheese lopes against the left side of the frame as shown in the picture. All the cheese slopes need to be sloping the same direction (mine had the high end against the frame). Skip one row of studs and add the second row, making sure that the slope is going the same direction as the first row. Keep skipping and adding rows until all 7 rows of the rainbow are attached to the base, all slopes the same direction.
The rainbow uses:
-7 red cheese slopes
-7 yellow cheese slopes
-7 blue cheese slopes
-21 light gray cheese slopes
Step 5: The Heart
Attach the first row of the heart design between the first two rows of the rainbow design. Just make sure that the slope direction is the opposite of the rainbow direction.
It can get a little confusing when adding the second image to the model. Since the pattern is symmetrical, I added a row to the left and the right sides at the same time, as shown.
The heart uses:
-15 white cheese slopes
-14 black cheese slopes
-13 red cheese slopes
Turn the model to side to side to see the two images magically appear and disappear.