What are your ? (Specifically your GPU and VRAM amount) At what exact percentage or frame does the render fail? Share public link
Below is the definitive, step-by-step technical guide to diagnosing, bypassing, and permanently fixing the verified Matte Assist ML render failure in Mocha Pro. Understanding the Root Causes
Open Mocha Pro and navigate to (Ctrl+Alt+P on Windows, Cmd+Comma on macOS). Click on the GPU tab.
If the CPU render succeeds: Your hardware, VRAM capacity, or graphics drivers are the direct cause.
Moach Pro's Machine Learning (ML) tools, particularly Matte Assist, offer powerful automated masking capabilities. However, users occasionally encounter render failures during complex VFX pipelines. When a matte assist render failure is verified, the issue typically stems from hardware constraints, software version mismatches, or specific clip configurations. matte assist ml render failure mocha pro verified
Although less common, a corrupt or improperly activated license can cause render failures. This can happen if:
The ML model used by Matte Assist can become desynchronized.
Navigate to Preferences > GPU . Ensure your primary dedicated graphics card is selected. Switch the driver type from OpenCL to CUDA (for NVIDIA cards) to improve stability with ML processing.
Upon reopening the project, Mocha will re-download the latest verified model (approx. 700MB). Ensure you have a stable internet connection. What are your
Sometimes the failure occurs because the ML model is overwhelmed by the complexity of the shape or the length of the shot.
| Case ID | Resolution | |---------|-------------| | #MOCHA‑4221 | Updated NVIDIA driver from 531.x to 535.98 – fixed OpenCL memory leak | | #MOCHA‑4873 | Deleted corrupted model_roto_v1.ort – forced re‑download | | #MOCHA‑5012 | Disabled “Hardware Accelerated GPU Scheduling” in Windows | | #MOCHA‑5189 | Moved footage from network drive to local SSD – path length / latency issue |
Machine learning tools require heavy interaction between software code, GPU drivers, and system memory. Failures generally stem from three areas:
Mocha Pro’s uses an on-device ML model to generate detailed foreground mattes from a rough user-provided shape (like an X-Spline). A render failure means the ML engine crashed, timed out, or received invalid input data. Understanding the Root Causes Open Mocha Pro and
. Ensure your NVIDIA drivers are up to date and that you are not running in a restricted virtual environment. Media Format Conversion:
This is a technical support write‑up addressing the error when using Mocha Pro (verified/licensed version) within a host application like Adobe After Effects, Foundry Nuke, or Silhouette.
I was pulling my hair out trying to render out a complex roto shape. Every time I clicked render, it would fail immediately. I finally found the culprit.
Ensure Mocha Pro is updated to a version that natively supports Apple Silicon CoreML. Turn off OpenCL if you experience crashes on M1/M2/M3 chips.