OTOY Forums

with the approach of octane 3.0 I was curious what the state of houdini particles in octane was. Can you carry over values like age/velocity/scale into the shaders? (like arnold or mantra) Im currently using octane in cinema 4d, and its lack of x-particles support is beyond frustrating.


so basically whoever gets particle support first is where Ill be using octane.. is that going to be houdini?

Currently Octane doesn't support custom attributes. This is something that is going to be added along the 3.x dev cycle, once the OSL support is ready to write the shader nodes needed to read these attributes.

You can render the Houdini particles with Octane using the Octane instancing features, but we don't have particle attributes support yet.

-Juanjo

Hi there, any idea as to when that might happen?

juanjgon wrote:Currently Octane doesn't support custom attributes. This is something that is going to be added along the 3.x dev cycle, once the OSL support is ready to write the shader nodes needed to read these attributes.

You can render the Houdini particles with Octane using the Octane instancing features, but we don't have particle attributes support yet.

-Juanjo

Not yet, sorry. In the near future I'll add to the plugin the support of the Octane native sphere primitive to help rendering large amount of particles, but from the shading point of view I don't know where the custom point, polygon, instance or particle attributes will be supported.

Thanks for your patience,
-Juanjo

How can I render particles with motion blur? when I turn on instance motion blur in the render node, it tells me to add octane obj spare parameters to the instance node, but they dont appear when I click the corresponding button. Only on non-instance geometry nodes. Is this a bug?

s---70 wrote:How can I render particles with motion blur? when I turn on instance motion blur in the render node, it tells me to add octane obj spare parameters to the instance node, but they dont appear when I click the corresponding button. Only on non-instance geometry nodes. Is this a bug?

If you have problems related to the instancing motion blur, probably the problem is that the instancer doesn't have the same number of particles among the frames. In this case the motion blur must be computed from the velocity vector attribute, that must be enabled adding the OBJ spare parameters to the instancer node. You have this option in the properties tab.

-Juanjo

the problem is, that it doesnt let me add the octane parameters to instancer nodes. works with other geometry nodes but not the instancer node.
Version is 3.00.20, maybe I have to update.

s---70 wrote:the problem is, that it doesnt let me add the octane parameters to instancer nodes. works with other geometry nodes but not the instancer node.
Version is 3.00.20, maybe I have to update.

Weird, so are you saying that you have a Instance OBJ node and you can't add the Octane spare parameters to it? The 3.00.20.0 is the latest build, so this is not the problem.

-Juanjo

ok sorry for the trouble, updated houdini to 15.5 and now it works!

When do we get Houdini color node supported ?