Uploaded October 2025 | Updated September 2026, 2 weeks ago

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Discover the revolutionary Mask ML with natural language prompting in Boris FX Silhouette 2025.5. In this tutorial, expert Ben Brownlee demonstrates the fastest way to automate complex matte creation by simply typing what you want to select.

Learn how to leverage the powerful new Cryptomatte workflow within the Mask ML and Matte Assist nodes. This allows you to simultaneously generate mattes for multiple objects—from buildings and cars to specific items like "taxis" or even semantic queries like "tallest person in the scene." We'll explore how to refine your AI-powered selections using the prompt threshold, manually add or remove objects, and isolate individual mattes later in your workflow.

Completely scriptable, this AI-driven tool will transform how you approach object selection.

// K E Y P O I N T S //
⦁ Intro to Mask ML and object selection using natural language text prompts.
⦁ How to use the new Cryptomatte workflow with the Matte Assist node to generate and manage mattes for multiple objects at once.
⦁ Techniques for refining AI selections and manually adding or removing objects.
⦁ Use semantic language for prompts, such as "tallest person" or "person wearing pink," to isolate specific elements
⦁ Understanding and managing the technical object limit when using the Cryptomatte data stream for complex shots.

Learn more about Silhouette here: borisfx.com/products/silhouette

// D I S C O R D C H A N N E L //
borisfxdiscord.com

#rotoscoping #VFX #videoeffects

/ / C H A P T E R L I S T / /
00:00 Intro
00:23 Add Objects with Mask ML
01:42 Prompting objects with text
03:22 Types of things we can prompt
05:01 Why won't Mask ML render?
06:23 This is scriptable!