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  • use xpresso to automate configuration of complex scene

    Posted by Simon Lucas on November 14, 2025 at 7:17 pm

    Can I use xpresso to loop through large numbers of Field Force objects and set up the paramaters I need.?

    For example I would likw to

    1. Set a spline in the Field Lists

    2. Set the paramaters in those spline fields.

    3. Assign particular Field Force objects to the ‘Include’ lists in particular emitter objects.

    Trying to get started with this, I see that I can drag a Field Force obejct into xpresso – and I can see the parameters, but cannot see how to attach a spline object to it’s Field List.

    I’m not I’m going around this the right way but in my new scene I predict 14 emitters each with 3 Field Forces attached. And I must exclude all forces from each of 14 MoSplines.

    I’ve done some xpresso, but find it hard to work out whether this is possible,

    Kouraib Abdmalek
    replied 7 months ago
    2 Members · 2 Replies
  • 2 Replies
  • Simon Lucas

    November 15, 2025 at 6:46 am

    Looked through an xpresso in detail book that I remembered I had, I started to realise that this is most likely a Python task. I will direct my attention to some experiments in generating objects and setting their parameters with Python, that I played with some time go.

  • Kouraib Abdmalek

    November 15, 2025 at 10:46 am

    Hi Simon,

    My understanding of what you’re looking for might be incomplete, but in general Expresso is good at controlling internal interactions between parametres. Programmers often resort to Python when it comes to custom tools and commands outside the scope of Cinema 4D, such as controlling interactions with external data sources. Ultimately, it comes down to difficulty and ease, your preference, and your proficiency in programming language versus logical equations. Otherwise, both Expresso and Python offer excellent solutions, with Python having an advantage for highly complex commands or where no existing tools can pave the way for acheiving such task. Good luck!

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