This asset includes:

• 3 particle system prefabs in two styles
• 4 bonus particle systems
• 1 custom shader
• Upgrade packages for URP and HDRP

The fog effect uses one simple texture at 1024x1024, with an alternate style version using a 8x8 spritesheet.

Prefabs included:

• Horizontal billboard effect that works well against flat surfaces
• Mixed horizontal & vertical billboards
• Falling fog billoards

Bonus prefabs:

• Smoke puff (2x)
• Smoke trail
• Floating dust effect

Custom shader:

With Soft Particles or Depth Texture (depending on SRP) enabled in your project, the custom shader lets you fade particles towards geometry such as walls and floors in your scene.

The shader also allows you to fade the billoards out as the Camera moves through them to avoid clipping artifacts (billboards popping in).

The custom shader also allows particles to fade properly with Scene Fog (in Lighting settings).