Losing the glow in Mental Ray - Maya 2012

[denison.17]

Maya 2012 Mac OS. I have a couple of large glowing objects but only one of them registers in the render. I have tried both the render view (with exporting post effects ON) and batch rendering.

Lets call the objects A & B.  In a full render, only A will register glow in the final.

If I isolate a small section around B in the render view the post effect adds the glow, but when I render the full scene, only A shows up.

It's not a particularly complex scene but it is large, 5486 x 2308.

Any help would be appreciated. thanks.

[_sebastian_f]

first of all i would never render glow directly in maya. i personally would add these kind of effects in postprod.

anyway first thing you should do when there are more objects with different shaders is to disable the "auto exposure" and play with the "treshold". at least with a treshold of 0 you should see all objects glowing. from there balance your settings.

[lightstream]

Thanks. Never had this issue before. I've turned autoexposure off. Threshold is at zero. No difference except that one is totally blown out now and the other is still non-existent. Do you suppose it is a MentalRay thing, because I'm not using the software render. 

I do lots of post production, but for certain situations I actually like the "in render" effect better. So far I have pretty much resolved to do that since nothing else seems to be working.