j00ey
It's not a bug as such. Rob from SideFX kindly explained how to deal with it here :

https://www.sidefx.com/forum/topic/96619/#post-424765 [www.sidefx.com]

tamte

sekow
But not sure if my LPEs are correct, even if they look alright.

If you always want to treat those objects as lights you can just do:

C.*<L.'tubes'>

but I assume your LPE tries to match both cases whether you interpret them as lights or keep as emissive surfaces

C.*[<L.'tubes'>+<O.'tubes'>]

in that case I think you can simplify by typing:

C.*<[LO].'tubes'>

ChrisBohm
I know this is an old post, but since I just figured out how to do it I might as well answer for the next generation:

It's actually quite easy.
When you choose a AOV in the dropdown, for example “RGBA”, you just change this to “RGBA_*”, which means it creates a RGBA AOV for every light group. Same for example for diffuse: Instead of just “diffuse” you change it io “diffuse_*”.

It is important though to create a ligth group for your lights. A light group is kind of an id for one or many lights. you can set the light group of a light in the Contribution Tab> AOV Light Group.

Unfortunately the documentation from solidangle does not describe the method very well…

Cheers

pezetko
You can use opacity trick (set Opacity to low and compensate it in Color and after render clamp Alpha channel).

Or you can use similar Emission trick as Krakatoa (what I understood from the online documentation). This method gives you same result but it's much faster to setup:

1. Use Mantra Surface shader.
2. Turn everything off except Emission (so “Enable Diffuse”, and “Enable Reflect” should be off“, and ”Enable Emission“ on).
3. Set ”Emission Color“ that way that no channel is equal to zero, (if you need more or less pure red set green and blue channel to very small value like 0.001).
This small value determines how fast it goes to the very bright (super white) color.
4. Set ”Opacity Scale“ to 0 for full ”additive" effect (and 1 is for no additive effect) (you need to render correct (desired) Alpha/Opacity in separate pass (with different material))

5. Enjoy

Cheers, P.Z.

drossxyu
I'm experimenting with using bundles as a means to create light rigs. I used the Bundle List pane (not the mantra pop-up) to create two bundles with various area lights. When I go into the objects tab of the Mantra ROP and click on the ‘floating bundle chooser’ button all the way to the right of the ‘force lights’ field I don't see my bundles in the left column. I can create bundles within this pop-up window instead and I will see it show up in the aforementioned Bundle List pane but the reverse isn't true. Is there any reason for this?


If I use the @ syntax in the ‘force lights’ field to call my bundle directly (@env, @rgbLights, etc) it works just fine either way but I am curious as to why the way they are listed is inconsistent.