This file makes gases and neutrons behave more to what they should. Gases no longer moves randomly, but rather in straight lines, until bumping into other particles, just like a real gas does, after all pressure isn't just a number, it is a large number of colisions in a short period of time. This is now more realistic. Neutrons don't wobble in their path like they do in TPT, but rather in real life they move in straight lines (rays) just like light. My autorun.lua also makes this correction.

tpt.el.hygn.diffusion=0
tpt.el.hygn.hotair=0.0009
tpt.el.hygn.collision=-1
tpt.el.hygn.airdrag=0
tpt.el.hygn.airloss=1
tpt.el.hygn.loss=1
tpt.el.hygn.advection=0.1
tpt.el.hygn.gravity=0

tpt.el.oxyg.diffusion=0
tpt.el.oxyg.hotair=0.0009
tpt.el.oxyg.collision=-1
tpt.el.oxyg.airdrag=0
tpt.el.oxyg.airloss=1
tpt.el.oxyg.loss=1
tpt.el.oxyg.advection=0.1
tpt.el.oxyg.gravity=0

tpt.el.gas.diffusion=0
tpt.el.gas.hotair=0.0009
tpt.el.gas.collision=-1
tpt.el.gas.airdrag=0
tpt.el.gas.airloss=1
tpt.el.gas.loss=1
tpt.el.gas.advection=0.1
tpt.el.gas.gravity=0

tpt.el.nble.diffusion=0
tpt.el.nble.hotair=0.0009
tpt.el.nble.collision=-1
tpt.el.nble.airdrag=0
tpt.el.nble.airloss=1
tpt.el.nble.loss=1
tpt.el.nble.advection=0.1
tpt.el.nble.gravity=0

tpt.el.wtrv.diffusion=0
tpt.el.wtrv.hotair=0.0009
tpt.el.wtrv.collision=-1
tpt.el.wtrv.airdrag=0
tpt.el.wtrv.airloss=1
tpt.el.wtrv.loss=1
tpt.el.wtrv.advection=0.1
tpt.el.wtrv.gravity=0

tpt.el.caus.diffusion=0
tpt.el.caus.hotair=0.0009
tpt.el.caus.collision=-1
tpt.el.caus.airdrag=0
tpt.el.caus.airloss=1
tpt.el.caus.loss=1
tpt.el.caus.advection=0.1
tpt.el.caus.gravity=0

tpt.el.co2.diffusion=0
tpt.el.co2.hotair=0.0009
tpt.el.co2.collision=-1
tpt.el.co2.airdrag=0
tpt.el.co2.airloss=1
tpt.el.co2.loss=1
tpt.el.co2.advection=0.1
tpt.el.co2.gravity=0

tpt.el.neut.diffusion=0

I just want to figure out one more thing. I find I can't change the "name" property of the element. Color yes. But not the name. How do I rename an element to a different 4letter code (like change METL to WXYZ) I tried all 3 of these:
tpt.el.metl.name=WXYZ
tpt.el.metl.name='WXYZ'
tpt.el.metl.name="WXYZ"

However none worked. It kept saying "invalid property". Please help.


Here's the list of supposedly valid properties that exist (and thus can be edited with Lua). I found this in powder.h.
const char *name;
pixel pcolors;
float advection;
float airdrag;
float airloss;
float loss;
float collision;
float gravity;
float diffusion;
float hotair;
int falldown;
int flammable;
int explosive;
int meltable;
int hardness;
int menu;
int enabled;
int weight;
int menusection;
float heat;
unsigned char hconduct;
const char *descs;
char state;
const unsigned int properties;