Barhandar
commented
2 years ago Happens because the coking code permits lacking up to 1 center and 4 corner brick blocks, so you have a valid coke oven in there. https://github.com/anegostudios/vssurvivalmod/blob/master/BlockEntity/BECoalPile.cs#L267
You could knock out more than 4 corner blocks from the underneath parts, or not have the door, to avoid this issue meanwhile.
Version: v1.16.5 Platform: Win10 Modded: Yes, but nothing that should be influencing cementation furnace or coke oven behavior (Bullseye, StepUp, Player Corpse, Gravel Sand Fix, Fix Roads, Crops Grow Half Speed) Single player
Description and Reproduction
While toying around with possible cementation furnace designs, I decided to try one out that had the smallest amount of open space underneath, which would be two open blocks for the fuel directly underneath the coffin with a coke oven door for refueling, built using fire clay bricks.
Turns out, this is close enough to the definition of a coke oven that, when the cementation furnace is fueled with coal, the coal stack nearest to the door will turn into coke after the standard amount of time (Twelve hours).
Screenshots
This screenshot was taken ~20-24 hours after the furnace was initially lit, as the rear stack of coal is nearly out. After the near pile converted to coke, it was ignited by the rear pile and continued to provide heat for the furnace, hence there only being 2x coke left in the pile.