[0.13.10] Modules Show Incorrect Percentages

[cammer733]

This is an incredibly minor problem, one that may not even be classified as a bug. I'm not sure. It really causes no problems at all, it just bugged me a little when I saw it. Productivity modules 1, 2, and 3 claim to increase pollution by %5, %7.5, and %10 respectively. The pollution increase shown by oil pumpjacks and electric mining drills is %50, %75, and %100 respectively.

20160723164544_1.jpg (492.73 KiB) Viewed 642 times

20160723164444_1.jpg (467.54 KiB) Viewed 642 times

[daniel34]

The pollution is not only affected by the +x% pollution, it's also directly related to the energy consumption which is increased by productivity modules.
From the wiki (https://wiki.factorio.com/index.php?title=Pollution):

Modules that list "+x% pollution" increase pollution multiplier, not a flat pollution rate. Final pollution value is (pollution multiplier * energy usage multiplier * base pollution), meaning heavily boosted buildings are likely to account for most of the pollution produced in a factory.

Mining drill without modules: 1 (pollution multiplier) * 1 (energy usage multiplier) * 9 (base pollution) = 9
Mining drill with 1x PM3: 1.1 (pollution multiplier) * 1.8 (energy usage multiplier) * 9 (base pollution) = 17.82

You can also see the pollution going down when using efficiency modules (or up with speed modules), although they don't directly affect the pollution:
Mining drill with 2x EM2: 1 (pollution multiplier) * 0.2 (energy usage multiplier) * 9 (base pollution) = 1.8