Setting the costs by using the id from BaseCosts Table and the value n of the following formula:

Using math: NewBaseCost = OldBaseCost * 2^(n-8), where n is the value of property 08.

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Discussion: http://www.tt-forums.net/viewtopic.php?t=46720

Examples

config for raise Terraform (x16), but keep foundations on default:

using Pikka's pb_build but modify foundations:

other similar grfs are:

- Pikka's "Modified Building Costs" (doesn't respect the new OpenTTD feature which splits terraform and foundations)

- Terkhen's "Raise landscaping costs"

- my old grfs: BaseCosts Mod 2 and Airmod