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Fit one bracer to your avatar, create its opposite-side mirror, and check both pieces in a neutral stance and a bent-arm pose. The same procedure works for paired shoulder pads or greaves.

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Before you start

Use a measured avatar and an imported bracer workspace. Save the costume before making fitting changes. Choose a roughly neutral pose through Avatar → Change Pose.

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1. Attach and position the bracer

  1. Select the bracer in Workspaces and click Attach.
  2. Move the ghosted preview to the avatar’s forearm attachment point and click that point.
  3. Select the attached bracer in the Costume viewport or Attachment Tree.
  4. Click Translate and drag its axis handles to position it. Click Rotate and use the rotation handles to align it with the forearm.
  5. Orbit around the arm. Check the wrist and elbow openings rather than judging only the front view.
Check: The bracer appears under an attachment point in the Attachment Tree. If it is attached to the wrong region, right-click it in that tree and use Move Part to choose the correct point.

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2. Adjust its size and inspect clearance

  1. Select the bracer and open the Scale controls in Transforms.
  2. Set Scale Mode to Percentage. Enable Uniform Scale for a broad size adjustment; on an initially unscaled part, changing 100% to 105% makes it larger.
  3. If only one dimension needs adjustment, disable Uniform Scale and change one axis at a time. Check Transform Mode before using local or world directions.
  4. In the selected attachment’s Property Grid, check Thickness against the material you intend to use. This setting is shared by attachments from the same source workspace.
  5. Click Fit Checker above the Costume viewport and wait for preparation to finish.
In Fit Check, set Color range to 20 mm for a consistent first comparison. Red indicates estimated distance at or below material thickness; green begins at thickness plus the range. The range changes display colors, not the part’s size. Adjust placement and scale, then let the colors update.

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3. Create the opposite-side mirror

  1. Select the original bracer and focus the Costume viewport.
  2. Press Shift+M, or enable Mirror in the Property Grid.
  3. Inspect the reflected bracer on the opposite forearm.
  4. Adjust the original to update the linked pair. Use Edit → Undo if you want to reverse the mirror command.
Check: There are two bracers, and editing the original updates its partner. If you need different geometry or independent placement on the two sides, attach separate parts instead of a linked mirror.

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4. Check a pose and save

  1. Choose Avatar → Edit Pose. Select an appropriate joint and use Translate, or select a bone and use Rotate, to bend the arm slightly.
  2. Leave Edit Pose when finished. Re-enable Fit Checker if changing modes turned it off.
  3. Check body clearance and look directly for contact between neighboring pieces. Fit Checker does not test part-to-part collisions.
  4. Choose Avatar → Reset Pose to return to the default pose, then save the costume.
Result: You have a fitted linked pair and have reviewed a second pose. This visual check does not simulate straps or guarantee comfortable movement; make a physical test before final fabrication. If both pieces move unexpectedly, check that you selected the original and that Mirror is enabled. If the shape needs a local change, continue with FFD fitting. For another body source, try a custom avatar.