Emission doesn't reflect on Image texture

Support Materials and Textures
1

I’m trying to have refletion on a plane with an image texture. The emission object has the following nodes, because I want to make it a bit blury. It works here :

image
image1599×837 271 KB

In a more complex project, with a hdr background and two area lamp, I made a particle trail of the emission object above. Basically I just wanted to make a bright particle trail to enlight the plane.

lightref
lightref960×540 1.02 MB

The background and area lamps are very weak, so the reflection of the light should be visible on the plane. It may be too weak ? Also, I’m worried as there is a lot of noise…

Once again I beg your help and thank you in advance.

2

cycles has problems to emit light from small particles

might improve using some composite emis blur nodes

but not that easy to do with very small particles

happy cl

3

I see, thank you for the information.
One other problem I found is that my scene is really small, and size has apparently importance in cycles render.