Imagination Studio 4.2.1 removes build machine paths from engines

Imagination Studio 4.2.1, a release of the Imagination-Studio-by-keys-Wasserman tool, is out. The release on GitHub reports that build-machine paths have been removed from the prebuilt engines: the H3 engines (libtf_h3.so), Drama 3 (drama3-generate and libtensorfold_drama3.so) for DGX Spark, and Bolt tensorfold-native for Mac carried build paths in their debug sections that had not changed since version 3.3.0. All four are now stripped of debug information. The code, data and CUDA kernels are byte-for-byte identical; only a few header bytes changed. The script scripts/build-carrier.sh now strips every engine it packages and refuses to accept a payload that names the build machine's home folder or user. Verification by alternating runs of the old and new builds on the same machine with identical seeds produced identical results: for H3, video and audio matched in all four runs; for Drama 3, the WAV files matched; for Bolt on Mac, 7 out of 7 responses were identical.

What it means

The change concerns Imagination-Studio-by-keys-Wasserman, an open source video generator under the Apache-2.0 license. The tool runs on Apple-silicon Macs via Metal and on NVIDIA DGX Spark, and uses the Fish Audio Drama 3 model for text-to-speech. The model weights are distributed under the Fish Audio Community License: research, non-commercial use and commercial use with annual revenue under 500,000 USD are permitted; hosted speech generation services require a separate license. The largest weights file is 3.5 GB, and all files together are 38.6 GB. The author describes a requirement of 8.3 GB of free VRAM and 128 GB of unified memory on DGX Spark. Release 4.2.1 does not change functionality: it is a hygiene update that removes traces of the build environment from the binaries. For a user running the tool on your own hardware, behavior stays the same — the author confirms this with a byte-for-byte comparison of the outputs. The tool fact sheet lists the latest release as v4.3.1, meaning 4.2.1 is an intermediate version, not the current one. Bolt and Drama 3 are not mentioned separately as standalone tool pages in the reference: they are part of Imagination Studio. Those who build the tool from source should keep in mind that the build script is now stricter: it will refuse to package an engine if the build machine's home folder paths or user name remain in it.