In this tutorial, we will show you how to walk through a door like in the Netflix series, The Witcher, using Adobe After Effects. Follow these steps to achieve this magical effect.

**Step 1: Prepare Your Footage**

1. Download the exact footage used in this tutorial or record your own footage. You will need:
   • A clean plate of the scene with the door.
   • A shot of yourself walking through a green screen.
   • A shot of yourself walking through the actual door.
2. Import your footage into Adobe After Effects and create a new composition.

**Step 2: Mask Your Subject**

1. Drag your green screen footage into the composition.
2. Use the **Pen Tool** to mask around your subject to key out the green screen. This will allow you to isolate the subject walking through the door.
3. Apply the **Keylight** effect to remove the green screen. Adjust the settings to clean up any remaining green spill.

**Step 3: Position and Animate Your Subject**

1. Place the masked subject layer above the clean plate layer in the timeline.
2. Position the subject layer so it aligns with the door in the clean plate.
3. Use keyframes to animate the position of the subject layer, making it appear as though the subject is walking through the door.

**Step 4: Apply Spill Suppressor and Additional Effects**

1. Apply the **Spill Suppressor** effect to the subject layer to remove any green spill from the edges.
2. Use the **Blur** effect to soften the edges of the subject layer and blend it seamlessly with the background.
3. Adjust the color and lighting of the subject layer to match the clean plate. You can use **Curves**, **Color Balance**, and **Hue/Saturation** effects for this.

**Step 5: Final Adjustments**

1. Review your composition and make any necessary adjustments to the timing and positioning of the subject layer.
2. Add any additional effects to enhance the realism of the shot, such as shadows or reflections.

**Step 6: Render and Export**

1. Once you are satisfied with the final look, render and export your composition by going to **Composition** > **Add to Render Queue**.
2. Choose the appropriate settings for your final output and click **Render**.

By following these steps, you can recreate the magical effect of walking through walls like in The Witcher using Adobe After Effects. For a detailed, step-by-step guide, watch the full video tutorial.