Blender bug: specularity influences transparent layer

Project:Blender
Component:Code
Category:bug report
Priority:normal
Assigned:Unassigned
Status:active
Project wiki:Blender wiki
Related pages:#1112: A plane textured with an image with transparency tutorial
Description

If you follow the tutorial "plane textured with an image", if the material has any specularity, the next textured layer will be visible in area where it is supposed to be completely transparent.

Comments

#1

compare before:
overshoot.1127.taxes-blender25.9.blend
and after:
overshoot.1127.taxes-blender25.10.blend

This may be due to the motion blur (??). To be tested and reproduced.

Basically, with this method, we cannot add any specularity to our material, at least until this bug is fixed.

Todo:
reproduce with simplest blend file and report.