OTOY Forums

Hi .

As the subject says, I need a gradient driven by an object... any way to do this in octane or pass the modo gradient rig to the plugin ?
Dealing with this and no info about.

Thanks in advance.

Hi - I don't think you could easily do this. I suspect you would need to bake the object value to a channel and then plug that into the Octane Gradient - but it would not be easy. If you send me a scene showing what you are trying to do, I can offer more suggestions.

Paul

Hi Paul.

Thanks a lot.

Attached a very basic file with the effect I need.
As I have no idea about how to deal with that in Octane, it's only rigged with modo native nodes.

Thanks for providing that scene. I could not achieve the result you are looking for with a gradient, but was able to get close using an Octane Noise node.

Paul

Hi Paul.

... nice trick !

Thanks for your help.

It can work for this particular scene, thanks a lot.
But it's not a general fix because I'm going to have a gradient x object near that surface.

So I really need a gradient ( or whatever procedural that can achieve the same effect ) to be driven by an object ( usually a locator )... that's a technique that I use a lot in the native render and in other 3D software.

I know that because of the "correct" nature of the engine, we lose some biased functionality found in other render solutions ( I'm talking about the Octane renderer itself, not the plugin ), but I really hope this is not going to be one of that "limitations".

I will keep investigating this until as long as my deadline allows me... but if anyone have suggestions or ideas, please don't be shy to share !

Hi - I don't think you will be able to feed a formula into a gradient - unless you bake it to a color channel.

Paul

Hey there,

maybe you can use this "hacky" approach: I basicly connected the locators position to a gradient:
I thougth i can just do this for the x y and z axis and multiply the results. It kind of works but it's not that pretty. Btw. @Paul is it possible to feed multiple Float values into a NodeGraph? I can create multiple Inputs but there are not present in Modo.

Greetings!

Ok, i thougth about it and build another rig. This is much simpler and looks better:

Hey.

Thanks a lot for the answer.
I finally found some similar solution but your rig seems more sophisticated !