OctaneRender 2020.2 for Houdini Production build 2020.2.0.4

[trogers]

Hi Juanjo,

I'm still messing around with the new Packed Geo Instancing functionality, now in 2020.2.0.4. It seems that when using the this feature, if you try to color your instance geo in Houdini and then pull that color into your Octane material network via a Vertex Color Attribute it wont render the color. In this file I'm using Copy To Points to instance the spheres and I'm randomizing the color on the points before they're copied. At the parent level for the geo I'm setting the Render Material path, the Octane Properties Packed Geo Instancing and the Octane Attributes Point Vector Attributes to 'Cd'. If I uncheck Pack and Instance on the Copy To Points node the spheres will render with color, however they all render white when this is checked.

I attached a hip file with the example. Let me know if I can get you any other info.

Thanks!
Travis

[galleon27]

Hi Juanjo,

I'm still messing around with the new Packed Geo Instancing functionality, now in 2020.2.0.4. It seems that when using the this feature, if you try to color your instance geo in Houdini and then pull that color into your Octane material network via a Vertex Color Attribute it wont render the color. In this file I'm using Copy To Points to instance the spheres and I'm randomizing the color on the points before they're copied. At the parent level for the geo I'm setting the Render Material path, the Octane Properties Packed Geo Instancing and the Octane Attributes Point Vector Attributes to 'Cd'. If I uncheck Pack and Instance on the Copy To Points node the spheres will render with color, however they all render white when this is checked.

I attached a hip file with the example. Let me know if I can get you any other info.

Thanks!
Travis

Octane doesnt support attributes on instances yet. There is a workaround for that in Houdini. Check this thread viewtopic.php?f=101&t=73105&p=372155&hi ... cd#p372155

[trogers]

Thanks Galleon27, I appreciate the info! I'm a little late to the game on this one. Workarounds are better than nothing.

Best / Travis

[chocbot]

Hi Juanjo,

in this release, the bloom and glare are only visible after the render has finished. In previous versions this problem could be fixed with disabling "show denoise" in the IPR. But now it only works when "enable denoise" is off in the rendertarget.
Could you revert this to how it was in previous versions?

Cheers, Lukas

[juanjgon]

Hi Juanjo,

in this release, the bloom and glare are only visible after the render has finished. In previous versions this problem could be fixed with disabling "show denoise" in the IPR. But now it only works when "enable denoise" is off in the rendertarget.
Could you revert this to how it was in previous versions?

Cheers, Lukas

The problem can be that this IPR button is not working at all. I'll check what could be the problem.

Thanks,
-Juanjo

[chocbot]

Great, thanks!

[motionskill]

Octane doesnt support attributes on instances yet. There is a workaround for that in Houdini. Check this thread viewtopic.php?f=101&t=73105&p=372155&hi ... cd#p372155

So, what is "Added support for packed geo instancing"? What is the reason to use packed geo option if we can't use colors and attributes? Does it mean that we can use it only with flat colors in shaders? What about UV on packed geo?

[Phantom4]

You can set the OCIO system variable to the config.ocio file provided with Houdini 18.5.x.

Add this line to Houdini.env:
OCIO = "C:\Program Files\Side Effects Software\Houdini 18.5.462\houdini\ocio\config.ocio"

[juanjgon]

Octane doesnt support attributes on instances yet. There is a workaround for that in Houdini. Check this thread viewtopic.php?f=101&t=73105&p=372155&hi ... cd#p372155

So, what is "Added support for packed geo instancing"? What is the reason to use packed geo option if we can't use colors and attributes? Does it mean that we can use it only with flat colors in shaders? What about UV on packed geo?

You can use the same workaround available for conventional instancing. Even while working with packed geo instancing, the "Cd" attribute is encoded and available for shading using the texture instancer color node and the rgb4k_map.ppm texture.

Hope it helps,
-Juanjo

[fantome]

Juanjo , i was trying to replicate your tricks in octane standalone, but without sucess.
i was wondering if you could give me some direction on what feature you use to bypass octane restriction ?

do you use the equivalent of the instance color node internally ?
or do you create per points UV that you remap throw rgb4k_map.ppm ?
or maybe it's only houdini centric trick that can't be replicated ?

from what i see externally it looks like uv on points that you remap ? but in octane standalone it looks that UV doesn't work with point primitive ? only geo and curves.

sorry for the little off-topic question but i don't know who can help me on this apart you and aoktar.
Cheers
E