There are a few different approaches you can take to make camphor smell like sandalwood after burning:
Mix in a small amount of sandalwood essential oil with the camphor before burning it. This will give the camphor a sandalwood scent as it burns.
Burn sandalwood incense or candles alongside the camphor. The scent of the sandalwood will blend with the scent of the burning camphor, creating a more complex and pleasant aroma.
Add a few drops of sandalwood essential oil to a bowl of water, then place the bowl near the camphor as it burns. The steam from the water will help to distribute the scent of the sandalwood, mixing it with the scent of the burning camphor.
Keep in mind that these methods may not produce a perfect match for the scent of sandalwood, but they can help to create a pleasant and aromatic blend that incorporates both scents.