Custom poison rules?

[Thomas Hobbes]

In the web enhancement for D20 modern, they provided rules for determining the cost and craft DC of "custom" poisons- that is, they listed base DCs for the various delivery types, modifiers based on what primary and secondary damage was caused and the save DC. From this, you could determe the cost and craft DC's of any poison you could think of. The web enhancement is here: http://wizards.com/default.asp?x=d20modern/article/20021103a

They said they provided this as a look "behind the curtain"- the rules used to determine the stats of the poisons in the rulebook, and thus how to create your own balanced poisons.

My question is, has anyone done something similar for D&D? Craft DCs are importable, but d20 modern uses a wealth system rather than gold. Since the Arms & Equipment guide, the Book of Vile Darkness, and Song and Silence all provide craft DCs for known D&D poisons, I could do comparisons to figure out a rough system. For example:

In D&D, Blue Whinnis is injury DC 14, with 1 point primary con damage and 1d3 hours of unconciousness secondary damage, costs 120 gp and has a craft DC of 15.

In d20 modern, that works out to DC 17 craft according to d20 modern, with a cost of 6 wealth (which, for reference, is about $45-$55 dollars according to the conversions they have). Suggestions for GP to gold conversion include 1gp= $10, $20, or $100. Also suggested has been to look at the actual value of gold by the pound, and go from there....

Basically, I'm seeing if I can save myself some work by finding out that someone else has already done it.

 

[Enumclaw]

I'm very interested to find out what you discovered.

I have been wanting to see some rules for building custom Poisons.

For instance, crafting a poison with customizable properties.

The Poison type: Ingested, Wound, Touch, etc
What type of damage may be done: Physical, Ability, or state
What the Damage Die may be
How long the effects may take/what the DC save is
Whether or not there is a secondary damage effect

It'd be nice to make a form to choose from to make the poison.
I've been trying to look over the poisons available and what the DCs to Craft are, but it's tough to reverse-craft them to find where to begin.

Does anyone have a suggestion for where I should start?

 

[Ashtagon]

A good starting point for conversion is the table in d20 Future p145. Basically, d20 wealth is a logarithmic value, with a +8 modifier translating to x10. Or in other words, +1 translates to x1.333.

0    1
1    1.333521497
2    1.778279583
3    2.371374052
4    3.162278277
5    4.216966062
6    5.623414897
7    7.498944652
8    10.0000039