Domes to be built on Gaseous Planets to increase suitability.

Dome(s) are built prior to colonization. Domes would come in 3 sizes and tech levels, T9, T12 & T16. Multiple domes can be built on a planet depending on its size. Once built the dome(s) would need to be Terraformed and then a colony started. Populous would automatically spread out into new domes. Dome Tech level and the number of comes would determine max population. Once built a dome can be upgraded to the next higher tech level.

IF this is implemented that it should be impossible to just drop a colony on a Gaseous planet until it has a dome and the inside of the dome is Terraformed.

I suggest a T16 dome should support 3 Billion population and increase Suitability by at least 5. T9 would support 1 Billion and raise suitability by 3. T12 would support 2 Billion and raise suitability by 4.

The number of domes that a planet can support would be determined by the planets size. I suggest: Small planet 2 Domes, Medium planet 3 domes and large planets 4 domes.

Once built and populated a LONG TERM Gas recycling project could be built to clear the air and make the whole planet habitable. This should take about 5-6 weeks to Terraform the atmosphere to Terran and further increase suitability and raise the population limit.