If you are looking for a SheepIt alternative for Blender, Farpy is building a distributed GPU render network with public proof rails.
Farpy submits Blender-style GPU jobs to remote worker nodes, assigns a GPU, renders the job, publishes an output, and emits a public receipt.
If you want a SheepIt alternative focused on distributed GPU rendering, receipts, and a civilian-downloadable node path, Farpy is the rail to watch.