Cataclysm-dda: The Internal Furnace can burn cotton, iron, plastic... but not leather?

[Regularitee]

To clarify, items made solely of iron, or solely of plastic can be consumed. But not those solely of leather.

[codemime]

To clarify, leather items can be consumed, but provide significantly less energy (1/4 of "normal" amount).
You can't burn radioactive stuff, you can't burn corpses. Everything else is burnable.

[Regularitee]

Items made solely of leather cannot be consumed -- or at least I can't consume them. It could be a mod is interfering with it, but in my own game I am unable to consume all-leather items, such as "leather pants" or a "purse". Many partially-leather items are okay, I suspect because they also contain at least one furnace-compatible material.

Can someone else confirm or deny whether the items specifically mentioned ("leather pants" and "purse") are consumable or not with the furnace bionic?

[keyspace]

Tried it on no-mod save - can't consume leather pants, cheat-wished or crafted.

Burning leather patches is OK, both via [e]at menu and via [i]nventory.

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EDIT: Slightly off-topic, I've started writing a unit test for bionics that consume items. So far it's been debugging why I can't build cata_test in the first place (solved), adding missing includes to bionics.h, writing up a skeleton UT test, trying it out, and now finally reading up on Catch. It'll take a while.

[Coolthulhu]

Furnace allows consuming only items that burn well - they need to be able to fuel size 1 fire. Leather requires size 2.

[kevingranade]

I suspect what's happening here is leather items are a lot more likely to
be composed of only leather, iron and plastic are red herrings in that they
aren't actually contributing to burn ability.
Do you have any sources indicating that leather goods are particularly
flammable? I was under the impression that leathet burns poorly.

[CoroNaut]

Leather burns hot usually, but it can be slowly burned.

[WizardOfOoo]

This is a video of someone taking a blowtorch to various clothing materials.
https://www.youtube.com/watch?v=Vio4kleGxhM

This link skips to leather.
http://youtu.be/Vio4kleGxhM?t=3m8s

[codemime]

Doesn't catch fire, barely chars.

[kevingranade]

Unless someone can provide some evidence for leather burning well, I'm closing this as working as intended.

[Regularitee]

The issue wasn't whether leather should burn well or not, it was the fact that leather items of sufficiently small size cannot be burned at all because they don't reach the "minimum" fuel value. That struck me as a bug.

If plastic and iron can be burned for fuel, I think leather items more than qualify.

[keyspace]

To clarify: iron/steel can't be burned (check with pliers, say).

Currently, leather items have to be cut up into patches. Those can be burned individually.