**System Information**
Operating system and graphics card
Operatins system Windows and Linux
**Blender Version**
Broken: Blender 2.6X
**Short description of error**
In blender-internal strange shadow receive from transparency objects i.e. volume and clouds as both containing file transparency.png
**Exact steps for others to reproduce the error**
Render file transparency.blend. Or to new file create object volume or cloud and run render.
Based on a (as simple as possible) attached .blend file with minimum amount of steps