Spore blossom particles render too dark when they're inside or near blocks

The Bug:

Spore blossom particles render too dark when they're inside or near blocks.

Steps to Reproduce:

1. Place down a spore blossom and wait for it to spawn some particles around it.
2. Look closely at the particles go near or inside blocks.
3. Take note as to whether or not spore blossom particles render too dark when they're inside or near blocks.

Observed Behavior:

Spore blossom particles render too dark when they're inside or near blocks.

Expected Behavior:

Spore blossom particles would not render too dark when they're inside or near blocks.