Campfire smoke particles are rendered too dark while they're inside of blocks

The Bug:

Campfire smoke particles are rendered too dark while they're inside of blocks.

Steps to Reproduce:

1. Place down a campfire.
2. Place down a non-transparent block above the campfire and wait for some smoke to pass through it.
3. Take note as to whether or not campfire smoke particles are rendered too dark while they're inside of blocks.

Observed Behavior:

The particles are rendered too dark.

Expected Behavior:

The particles would not be rendered too dark.