: Turn off the visibility of your Matte Assist layers one by one. Attempt a preview render after disabling each layer to pinpoint the exact shape causing the failure.
For 4K+ or log-space EXR workflows, export a temporary 8-bit or 16-bit ProRes/DNxHR proxy at 1080p. Perform your Matte Assist tracking and roto on the proxy inside Mocha, save the data, and apply the tracking/shape data back to the high-resolution plate in your main compositing timeline. Step 4: Perform a Clean Driver and Runtime Alignment
The following steps are verified to resolve of "Matte Assist ML Render Failure" reports. Perform them in order. matte assist ml render failure mocha pro verified
Verify that the is set to Auto for full sequence processing.
To avoid encountering this error in the future, follow these preventive measures: : Turn off the visibility of your Matte
The Matte Assist ML tool is highly dependent on specific hardware capabilities. If your system doesn't meet these requirements, the render will fail or fall back to a much slower CPU process. GPU Requirements : Requires an NVIDIA GPU
If you continue to face the , verify this checklist: GPU: Updated to the latest studio drivers. Workspace: Using the Essentials or ROTO workspace. Action: "Generate Object Mat" is enabled. Cache: Cleared in Mocha Preferences. Perform your Matte Assist tracking and roto on
Highly compressed inter-frame codecs (like heavily compressed H.264 or H.265/HEVC) can cause decoding errors that cascade into the ML rendering pipeline.
This error typically appears after Mocha Pro has successfully analyzed the clip, trained the ML model on your foreground selection, and seemingly begun the final render pass. Instead of a clean alpha channel, you are met with a gray preview, a black screen, or an abrupt crash notification.