OTOY Forums

Hello,
I'm wondering if I could ask how someone might tackle this...

I've been asked to 'reveal' an actor into a shot, they are to be revealed by there bodies filling up with liquid (some sort of 'fulfilment' metaphor or what have you). The liquid needs to move up slowly and reveal the texture of the actor (i have the footage with actor, plate without, in the moving shots I have moco too), but the liquid top, that is the top surface needs to be blue.

Thus far I have managed to make a mesh to match the actor and animate it to match the movement, then do an Xparticles sim so it fills up. I have tried using triplanar mapping, with the blue colour in the +Y-Y and the footage in the other two but its a bit janky as you can imagine.

Has anyone done anything like this before?

The reason I post in the octane forum is I'm hoping someone can offer a solution whereas I can use triplanar and be able to get mattes for each 'part'.

Thank you and I hope this all makes some kind of sense!

Please share some screenshots...if you are using a Specular material for the liquid, you need to use the Transmission channel for coloring it.

ciao Beppe

Hi Beppe, Here is about as far as I got, the basic animated mesh has a material with triplanar mapping, y+- has a blue colour, this is the 'surface'.
As you can see, I obviously run into issues with it, as the mapping projects incorrectly (actually correctly, it's doing its job, just not what I want!)
Perhaps there's a way for me to specify that a map is created where the sim contacts the cage and feed that into the texturing process?! Again perhaps less an Octane question, I am terribly sorry.

Thank you

Hi,
is it not possible to use a vertex map to control the transition between the actor and the liquid?

ciao Beppe

Hi,
That's what I'm hoping, I'm not sure how to generate it as yet. I did try Xparticles vertex map tool but it was far too low res. Also, I'm using Octane V4 and the vertex maps can be a bit crashy, but It will still be my prefered method.