ReplicationPad3d

https://pytorch.org/docs/stable/generated/torch.nn.ReplicationPad3d.html

replication_pad3d_demo.py
import svetoviz_webgpu as sv

# 1. Prepare 3D volume (e.g., 32 slices)
input_volume = torch.from_numpy(np.stack(slices)).unsqueeze(0).unsqueeze(0)

# 2. Define ReplicationPad3d (Pads 2 voxels across all dimensions)
pad3d = nn.ReplicationPad3d(padding=2)

def terminal_callback(buffer, message, images, files):
    output = pad3d(input_volume)

    buffer.send_system_message(f"Input Voxel Grid: {input_volume.shape[2:]}")
    buffer.send_system_message(f"Padded Voxel Grid: {output.shape[2:]}")
    buffer.send_system_message("Volumetric edge-clamping applied to all dimensions.")

# 3. Start the interactive session
sv.pytorch_web(module=pad3d, terminal_callback=terminal_callback)
Volumetric Replication
ReplicationPad3d volumetric visualization
The 3D version extends the voxel grid by replicating the outer "shell" of voxels. This prevents information loss at the edges of the volume during 3D convolutions.