Enchantment Basin Success Percentage Formula

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Aelryn Bloodmoon
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Enchantment Basin Success Percentage Formula

Post by Aelryn Bloodmoon » Thu Jul 19, 2018 5:45 pm

Mithreas wrote:
Thu Jul 19, 2018 6:18 am
10k is the magic number.

The game computes the value of the item with the property you are meaning to add. It then uses "how close are you to 10k" to determine the % chance, and if less than 5% or more than 95%, applies a cap.

Example 1:

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So let's say you add +1 to a skill, a value of about 100g. 

100 / 10,000 = 0.01 or 1%.

100%-1% = 99% chance of success.

99% is greater than 95%, so 95% cap applies, and the chance presented is 95%. 
Example 2:

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You have an item worth 7.5k, and want to add +1 to a stat, which will take the item to 9.7k value. 
9,700/10,000 = 97%
100%-97% = 3% chance of success
3% is less than 5%, so the min 5% chance applies.
Example 3:

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You have an item worth 10k.  You want to add another property worth 3k to it, total 13k. 
13k/10k = 130%
100%-130% = -30%
This is an "impossible" item - so you get a 5% chance but no god save for auto success.
Enchantment focused characters essentially discount the item value - 35% for ESF, 20% for GSF and 10% for SF. This is applied before working out the % chance. So let's take each of our three examples, but add a spell focus to each.

Example 1, with spell focus enchantment:

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you add +1 to a skill, a value of about 100g. 

SF: enchantment: 100g x 0.9 = 90g

90 / 10,000 = 0.009 or 0.9%.

100%-0.9% = 99.1% chance of success.

99.1% is greater than 95%, so 95% cap applies, and the chance presented is 95%. 
Example 2, with Greater Spell Focus Enchantment:

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You have an item worth 7.5k, and want to add +1 to a stat, which will take the item to 9.7k value. 
GSF enchantment applies: 9700 x 0.8 = 7760.
7760/10,000 = 77.6%
100%-77.6% = 32.4% chance of success.
(Rounded down to 32%).
Example 3, with Epic Spell Focus Enchantment:

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You have an item worth 10k.  You want to add another property worth 3k to it, total 13k. 
13000x0.65 = 8450
8450/10k = 84.5%
100%-84.5% = 15.5%
15.5% is rounded down to 15% success rate - and god saves apply as usual.
This demonstrates why enchantment spell focuses rock.

There are a couple of other minor tweaks in the system (e.g. to stop people enchanting cheap items using ESF and then selling them to merchants for a profit) but hopefully that explains it.

Feel free to wikify :)

-Mith
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-Faiths and Pantheons (c)2002

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Jack Oat
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Re: Enchantment Basin Success Percentage Formula

Post by Jack Oat » Thu Jul 19, 2018 6:46 pm

A calculator exists to be used in conjunction with PGCC. It can tell you whether or not an enchantment set is possible or not, the percent chance of success, cost of attempts, and whether or not an enchantment can be godsaved.
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Woper_The_Black
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Re: Enchantment Basin Success Percentage Formula

Post by Woper_The_Black » Fri Jul 20, 2018 6:55 am

How do we log into the PGCC again ?

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triaddraykin
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Re: Enchantment Basin Success Percentage Formula

Post by triaddraykin » Fri Jul 20, 2018 11:17 pm

https://neverwintervault.org/project/nw ... ered-igipe but i don't think the arelith PGCC is up anymore
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Jack Oat
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Re: Enchantment Basin Success Percentage Formula

Post by Jack Oat » Sat Jul 21, 2018 10:22 am

Woper_The_Black wrote:
Fri Jul 20, 2018 6:55 am
How do we log into the PGCC again ?
You don't need the Arelith PGCC for the calculator.
Kuma wrote:i love haks
i have a high rpr
cogito erget rekt
DM Spyre wrote:It's Jack. What do you expect?
Garrbear wrote:quite bluntly we can't balance the server around people who don't play well
Irongron wrote:My main takeaway from this is that Jack is apparently personable

Alox
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Re: Enchantment Basin Success Percentage Formula

Post by Alox » Sun Jul 22, 2018 1:06 pm

Is the cost in the basin simply the increased cost of the item value?

Aelryn Bloodmoon
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Re: Enchantment Basin Success Percentage Formula

Post by Aelryn Bloodmoon » Mon Jul 23, 2018 2:11 am

Alox wrote:
Sun Jul 22, 2018 1:06 pm
Is the cost in the basin simply the increased cost of the item value?
I believe the cost in the basin is the difference between the cost before enchantment and the cost after the enchantment (modified by SF feat %'s).
Bane's tyranny is known throughout the continent, and his is the image most seen as the face of evil.
-Faiths and Pantheons (c)2002

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