I was just going to ask about this.  Since the albedo doesn't decrease when water vapour desublimate into ice, you benefit from adding water vapour first (you should do this anyway to let it condense to water/desublimate to ice while you're adding other gases), since the albedo will increase when the ice sheet melts (at -17C?). 

I can confirm this works as per 1. 12, and breaks Albedo.

To replicate, SM change the atmosphere of a planet to reduce its temperature, add hydro, then atmo change to raise its temperature.
The Albedo will increase.  You can repeat this to raise the albedo as high as you wish.
The reverse is also true - set hydro high, and atmo-reduce temperature.  Remove the hydro, re-set the atmo, and albedo lowers.

Titan is a good example - normally it cannot get into perfect habitable range - with max Greenhouse Factor, it can only reach a temperature factor of 0. 637. 
But if you add enough hydrographic extent (the perfect number is 42, of course) before you add greenhouse factor, then albedo will rise to 1. 063 which allows the temperature to reach -9. 6 degrees C.

Quote from: Steve Walmsley on May 14, 2020, 10:57:18 AM

Quote from: GL on May 14, 2020, 10:49:10 AM

Quote from: Steve Walmsley on May 14, 2020, 04:52:23 AM

Quote from: steili on May 13, 2020, 12:19:26 PM

I've tried searching for this, but it doesn't seem to be documented anywhere except for a paragraph on how it works in VB6:

Quote

The amount of albedo change is based on the extent of the ice sheet (F9 again) plus a random factor.

Is this still the case in C#? I've constructed a spreadsheet to calculate optimal terraforming, but as of now I need to recalculate when ice sheets melts. This would be unnecessary if I knew beforehand how the albedo would change :-)

When the ice melts, Albedo increases by 0.0015 * Hydro Extent.

Does this mean that if I add water vapor while the water is frozen I'll get a bigger Albedo increases when it melts?

Yes, although I probably should change it so that adding ice reduces Albedo.

Why would ice reduce Albedo?

Quote

Albedo is a non-dimensional, unitless quantity that indicates how well a surface reflects solar energy. Albedo (α) varies between 0 and 1. Albedo commonly refers to the "whiteness" of a surface, with 0 meaning black and 1 meaning white. A value of 0 means the surface is a "perfect absorber" that absorbs all incoming energy. Absorbed solar energy can be used to heat the surface or, when sea ice is present, melt the surface. A value of 1 means the surface is a "perfect reflector" that reflects all incoming energy.

Because albedo in Aurora is backwards. The larger it is, the more energy the body absorbs.

Quote from: GL on May 14, 2020, 10:49:10 AM

Quote from: Steve Walmsley on May 14, 2020, 04:52:23 AM

Quote from: steili on May 13, 2020, 12:19:26 PM

I've tried searching for this, but it doesn't seem to be documented anywhere except for a paragraph on how it works in VB6:

Quote

The amount of albedo change is based on the extent of the ice sheet (F9 again) plus a random factor.

Is this still the case in C#? I've constructed a spreadsheet to calculate optimal terraforming, but as of now I need to recalculate when ice sheets melts. This would be unnecessary if I knew beforehand how the albedo would change :-)

When the ice melts, Albedo increases by 0.0015 * Hydro Extent.

Does this mean that if I add water vapor while the water is frozen I'll get a bigger Albedo increases when it melts?

Yes, although I probably should change it so that adding ice reduces Albedo.

Why would ice reduce Albedo?

Albedo is a non-dimensional, unitless quantity that indicates how well a surface reflects solar energy. Albedo (α) varies between 0 and 1. Albedo commonly refers to the "whiteness" of a surface, with 0 meaning black and 1 meaning white. A value of 0 means the surface is a "perfect absorber" that absorbs all incoming energy. Absorbed solar energy can be used to heat the surface or, when sea ice is present, melt the surface. A value of 1 means the surface is a "perfect reflector" that reflects all incoming energy.

Quote from: Steve Walmsley on May 14, 2020, 04:52:23 AM

Quote from: steili on May 13, 2020, 12:19:26 PM

I've tried searching for this, but it doesn't seem to be documented anywhere except for a paragraph on how it works in VB6:

Quote

The amount of albedo change is based on the extent of the ice sheet (F9 again) plus a random factor.

Is this still the case in C#? I've constructed a spreadsheet to calculate optimal terraforming, but as of now I need to recalculate when ice sheets melts. This would be unnecessary if I knew beforehand how the albedo would change :-)

When the ice melts, Albedo increases by 0.0015 * Hydro Extent.

Does this mean that if I add water vapor while the water is frozen I'll get a bigger Albedo increases when it melts?

Yes, although I probably should change it so that adding ice reduces Albedo.

I've tried searching for this, but it doesn't seem to be documented anywhere except for a paragraph on how it works in VB6:

Quote

The amount of albedo change is based on the extent of the ice sheet (F9 again) plus a random factor.

Is this still the case in C#? I've constructed a spreadsheet to calculate optimal terraforming, but as of now I need to recalculate when ice sheets melts. This would be unnecessary if I knew beforehand how the albedo would change :-)

When the ice melts, Albedo increases by 0.0015 * Hydro Extent.

I stand corrected

I think the correct restriction is 0.1 - 0.3 atm, and below 30% overall.