How to make an animated digital sign | Blender 3.4

Image setup

I have provided the basic sign for you so you can follow along – link is in the description

The images I’m using are tagged as “public domain” on Google – links are in the description

I will use the white noise texture on the screen

In edit mode, I select the screen and use the P-key to separate it from the rest of the sign

I split the viewport and open the shader editor

I delete the principled shader

I add a texture coordinate, Voronoi texture, and white noise texture node

I connect the generated output of the texture coordinate node to the vector of the Voronoi texture

I connect the color of the Voronoi texture to the vector of the white noise texture

I finally connect the value of the white noise texture to the surface of the material output

To make sure I can see individual blocks rather than the default Voronoi texture, I change the randomness of the Voronoi texture to zero

To make the blocks smaller, I change the scale to 20

I add two image texture nodes and open my images

I add a texture coordinate node to each image – using the UV output option

I then add a mix shader to combine the two images and plug it into the output node

I then connect the value of the white noise texture to the factor of the mix shader

Under the UV workspace, I unwrap the screen and then rotate and scale the UVs so the images appear correctly on the screen

For a cleaner transition, I add a math node between the white noise texture and mix shader node [convertor]

I change the function to greater than – this means that I can animate the sign using any number between zero and one

I can now animate the sign

I split the viewport and open the timeline

I will be using a frame rate of 30 FPS and change the end frame to 60

On frame 1, I make sure the threshold of the math node is set to zero

I hover my cursor over the threshold of the math node and use the I-key to insert a keyframe

On frame 60, I change the threshold of the math node to one

I hover my cursor over the threshold of the math node and use the I-key to insert a keyframe