**System Information**
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 446.14
**Blender Version**
Broken: version: 2.83.2, branch: master, commit date: 2020-07-09 05:50, hash: `rB239fbf7d936f`
**Short description of error**
Using transparent material for a object which is used for particle will leave a weird black "thing" around the end of the particle.
{F8695512}
**Exact steps for others to reproduce the error**
- Change background color to blue.
- Track a movement using motion tracker.
- Add a plane and make it a child of the track object.
- Add particle to the plane.
- Add a sphere object and make the particle render as this sphere.
- Add transparent material to the sphere.
- Change renderer to Cycles.
- Blender file included.
{F8695524}