Open Roblox Studio
Open your place or create a new one
Import your custom face image into Roblox as an asset
Copy the asset ID of the uploaded face
Insert a character model or use an existing avatar rig
Select the head part of the character
Add or edit the face decal on the head
Paste your custom face asset ID into the decal texture property
Make sure the face is assigned to the correct head
Test the character in Play mode
Save and publish your place