Shadow Acne in Three.js

Based on the information available in the Three.js documentation, I can provide some general insights about shadow handling in Three.js, though I don't have specific information about the PCSS (Percentage Closer Soft Shadows) implementation you're referring to from the video.

Three.js provides several shadow-related classes that can be used to manage shadows cast by different types of lights:

• LightShadow (base class)
• PointLightShadow
• DirectionalLightShadow
• SpotLightShadow

Shadow acne is a common issue in real-time 3D rendering where self-shadowing artifacts appear as dark patterns on surfaces. While I don't have specific information about the technique mentioned in your video, Three.js does provide some built-in solutions for shadow acne:

1. The .bias property on shadow objects can be adjusted to reduce shadow acne
2. The .normalBias property (available on some shadow implementations) can help with surfaces at grazing angles

For implementing PCSS or other advanced shadow techniques in Three.js, you might need to create custom shader materials or use existing community extensions.

If you're looking to implement the specific technique from the video, you might want to check the Three.js examples repository or community forums for PCSS implementations that could be modified with the approach shown in the video.