CREATING YOUR TEXTURE ATLAS
What is a texture atlas ?

A texture atlas or motif is an image or a video loop containing footage aligned on a grid. Each cell can be a different image, graphic element, text or video loop. Mosaic optionally sorts the texture atlas cells by luminance to closely manipulate the appearance of the original footage. Mosaic allows for a texture atlas to have a grid with a maximum size of 16 columns and 16 rows, or 256 cells.

We recommend to tint the pixels of your motif to white and use an alpha channel to provide transparency. This setup will lets you customize the color of your motif on the fly using the Material Colors Group.

Your can use any image or video formats supported by the host to create your atlas. We recommend PNG for the images and Apple Prorez for the videos.
A very simple texture atlas made of abstracted shapes with 3 rows and 3 columns :
Stacks Image 61


Your can use any image or video formats supported by the host to create your atlas. We recommend PNG for the images and Apple Prorez for the videos.
How to use your motifs in Mosaic ?

Open the Material Group to reveal its parameters and perform the following actions :

After Effect and Premiere Pro :

1. Drag and drop your texture from the Project window to the timeline of your composition
2. In the Material Group, set the Texture Menu to “Custom Texture”
3. In the Material Group, select your texture from the Footage Menu
4. Adjust the Column and Row values to fit the grid you used to create the texture atlas.

Final Cut Pro :

1. In the Material Group, set the Texture Menu to “Custom Texture”
2. Select the Footage Image Well parameter (this drop zone is located below the Material Group)
3. Select an existing layer to assign its contents to the parameter.
4. Adjust the Column and Row values to fit the grid you used to create the texture atlas.

Apple Motion :

1. In the Material Group, set the Texture Menu to “Custom Texture”
2. Drag and drop your texture into the Footage Image Well parameter (Material Group)
3. Adjust the Column and Row values to fit the grid you used to create the texture atlas.


How to decide your texture atlas resolution ?

Mosaic use GPU acceleration to render the effect, depending of your graphic card you will be able to create your texture at a maximum resolution of 2048, 4096 or 8192 pixels.


How to decide about your texture cells aspect ratio and dimension ?

In the Mosaic plugin, the kind of resolved tilling where the cells perfectly fill the screen without being cropped is called Uniform Tiling. To obtain this ideal tilling the common cell width and height should be a subdivision or a multiple of the original image dimension.

Here is a trick to help in determining the cell dimension for any compatible ratio :

1. In the Material Group set the Texture menu to “Graphic”
2. Set the Recipe Menu to “ Rounded Rectangle”
3. Play with the Width and Height Ratio Parameter to find and interesting ratio. Eventually adjust the Density and Adaptiveness parameter to visualize the tilling with different settings.
4. Look at the Cell Size feedback parameter at the bottom of the Material group. These values indicate the actual dimension of one cell.
5. Multiply or divide these values by the same number to produce a valuable cell dimension and ratio.
6. Finally, assemble multiple cells of this dimensions on a grid to create a motif.


Free Atlas Calculator Plugin

We provide a free plugin called
Atlas Calculator to make life easier. This helper tool lets you automatically produce a virtual atlas ( with any number of columns/rows) on the fly, then export its infos as a text file and also a transparent template grid image than can serve as a reference.

Download Atlas Calculator