Transparent material not behaving correctly with alpha

[TeoRossi93]

Hey guys!
 
I'm trying to render a glass object on a transparent background. Unluckily I'm not able to keep reflections visible in the alpha.
Any ideas on how to keep them visible without rendering a reflection pass and composite it in after/photoshop?

[burnin]

"Eeryone coins its own luck." ;)
So what's your setup, sys-specs...?

i.e.
Simple setup (W10, R23.110, CRN 7daily) saved as .exr, (16bit) composited in GIMP

[TeoRossi93]

I run c4d r22 and corona 6 for this one (i even run c4d 23 and corona 7 but I just use it for test purpose).
The problem is that I have to composite an animation, no problem to make this work in still images.
Anyway your render looks pretty different from the image opened in gimp.

[burnin]

...your render looks pretty different from the image opened in gimp.

Yup.
And now, something completely different... ;)



Basically:

Have fun.

[ficdogg]

I've had to do something similar and I ended up just setting up render passes for reflection and refraction in addition to alpha, and then comped everything in After Effects. You can see the end result here.

t=10s

This was rendered on gray, the blue color and DOF were added in post.