In this tutorial, we will show you how to create the epic one man army or army cloud effect using Adobe After Effects. Follow these steps to achieve this impressive visual effect.

**Step 1: Prepare Your Footage**
Record your footage using a camera on a tripod and a portable green screen to ensure consistent lighting and environment. Shoot multiple clips of your actor wearing different costumes, performing different actions, and from different perspectives and angles. Ensure you have a centered warrior, a warrior on the right, and a warrior on the left. Make each clip at least 5 seconds long for better randomization.

**Step 2: Import Footage and Create a New Composition**
Import your recorded footage into Adobe After Effects. Create a new composition for each clip and ensure they all have the same settings (resolution, frame rate, etc.).

**Step 3: Key Out the Green Screen**

1. Select a clip and go to **Effect** > **Keying** > **Keylight (1.2)**.
2. Use the **Eyedropper Tool** to select the green color to key out the background.
3. Adjust the settings to refine the key and remove any green spill. Repeat this process for all clips.

**Step 4: Arrange Your Warriors in the Main Composition**

1. Create a new main composition and drag all the keyed-out clips into it.
2. Position the warriors in the desired formation. You can flip some clips horizontally by going to **Transform** > **Flip Horizontal** to add variation.
3. Scale and position the warriors to fit the scene and create the illusion of depth.

**Step 5: Randomize and Offset the Clips**

1. Randomize the starting point of each clip by offsetting the layers in the timeline. This will make the actions of the warriors appear more dynamic and less synchronized.
2. Adjust the timing of the actions by trimming and shifting the layers as needed.

**Step 6: Add Shadows and Reflections**

1. Create a new solid layer for the shadow. Position it below each warrior layer.
2. Use the **Ellipse Tool** to draw an oval shape representing the shadow under each warrior.
3. Apply a **Gaussian Blur** to soften the edges and adjust the opacity for realism.
4. Animate the shadows to match the movements of the warriors.

**Step 7: Color Correction and Final Adjustments**

1. Apply color correction effects such as **Curves**, **Hue/Saturation**, and **Color Balance** to match the warriors with the background scene.
2. Add motion blur to the warrior layers for a more dynamic and realistic effect. Enable **Motion Blur** for each layer.

**Step 8: Render and Export**
Once you are satisfied with the effect, render and export your composition. Go to **Composition** > **Add to Render Queue** and choose the appropriate settings for your final output.

For a detailed, step-by-step guide on creating the one man army effect using Adobe After Effects, watch the full video tutorial.