...
Also, why PRODUCT_DIMENSION:150?
Random number to control the amount of blood that will fill a given container. (What I didn't copy&paste was a custom tool that only held 450, and was specifically called here.) Sorry, I should have culled that.
As for why blood? It was something else randomly chosen for it's convenience. I originally followed a suggest on the wiki to make blood a contact poison. Then to play with injections I used a material that just happened to be handy, and made use of it to make an inject-able poison. When I needed some to play with the production tag? I reached for the blood again.
What are you drawing the blood from? It looks like you just spawn it in a jug, and then use it to make steel.
Sorry, need to proof read more, I did not outright spell that out because the only creature that could use the reaction was the 'Lionman' creature at the head of the post; Therefore, the only thing that could the reaction was the 'Lionman'. Therefor, there was no need to do more then pull down a container that could just by chance hold a liquid, and then spawn the liquid from the only creature that could use the reaction.
Meat or a corpse peace or another reagent that I could definitively define (because I don't know how to reference any sort of live creature.) would have been better, maybe. I don't like using blood because of the 'dark' theme that has. I was going to the Lionman's for simplicity (from my point of view.), it just struck me as sick to use a corpse peace or meat (that had to have come from a
dead Lionman) to get at the blood material.
It's the same as "take a jug and a steel bar, make a steel bar".
Only one step more complicated then that. "Take jug, stuff item that has a specific [MATERIAL_FROM_REAGENT] stored, and then make steel bar from that [MATERIAL_FROM_REAGENT] item stored in a jug."
It doesn't have to be steel or even blood. It was just handy for me to make that example. The tanning reaction in 'reaction_other.txt' is a far more simple example I should have used, maybe. However, not as creativity as I would have liked. More then that, not really what I was after. I wanted to bust the mold, and make something think 'what if'. (Even if I do ramble like a idiot at times.
)