The laboratory pillars use four specific items in fixed corners; this spoiler-marked answer gives the complete placement.

For the Suncraft laboratory pillar puzzle, place Magma in the top-left, Gold Bar in the top-right, Glass in the bottom-left, and Grape in the bottom-right. Read the positions from the front of the four-slot laboratory panel.
Spoiler: exact pillar placement
| Position | Required item |
|---|---|
| Top left | Magma |
| Top right | Gold Bar |
| Bottom left | Glass |
| Bottom right | Grape |
Use the layout in the correct orientation
Face the panel so its two upper and two lower positions form the same square shown in the interface. Place the upper pair first, then the lower pair. This reduces the chance of swapping left and right after rotating the camera.
The current answer comes from a Steam Community solution to a player blocked on the laboratory pillars. It is not a generic crafting recipe: each material belongs to a position. If your screen has more than four slots, different labels, or a panel outside the laboratory, stop rather than forcing this arrangement into a different puzzle.
If you are missing an item
Confirm the exact item names in your inventory before substituting something visually similar. Magma and Glass are different requirements; Gold Bar is not an unprocessed ore; Grape is the named fruit. The source verifies the final placement but does not establish a universal fastest farming route for every ingredient, so this page does not invent one.
Return to the active villager objective and the unlocked biome or workstation if one item has not appeared in your progression. Use the Suncraft walkthrough for the broader sequence and preserve a save before consuming or moving scarce materials.
Achievement check
Steam describes Riddle Master as solving both the torch and pillar riddles. Once this panel reacts, finish the Suncraft torch puzzle if needed. If both rooms are complete but Steam still shows the achievement as locked, follow the evidence checklist on the Suncraft Riddle Master page before filing a report.
Sources
QUICK ANSWERS
Questions players ask next
What is the Suncraft pillar puzzle solution?
Place Magma top-left, Gold Bar top-right, Glass bottom-left, and Grape bottom-right in the laboratory layout.
Does the Suncraft pillar puzzle count for Riddle Master?
Yes. Steam's achievement description explicitly names the pillar riddle together with the torch riddle.
HELP SHAPE THE NEXT UPDATE
Missing an answer—or found something outdated?
Send the exact game problem, platform, and version. Corrections are reviewed before expansion requests.