Update to marginal worlds megaprojects, to make it easier to understand, conversion to habitable marginal world can only be done on Telluric worlds of specific classes, while conversion to sub-marginals can only be done on Sub-telluric and Magma worlds of specific classes. For this to work 100% a new game is required, but not that important if you don't care some of these worlds may have spawned as Telluric instead of Sub-telluric and vice versa which results in failure to build the megaproject.

Subterranean terraforming district build time adjusted (requires extended sub-mod, otherwise ignored).

Removed changes to asteroid field scaling for performance reasons;
Changed Survivor trait (used on Post-apocalyptic origin) to provide 25% habitability bonus in Marginal worlds (not just Tomb) instead of the bonus I had before. So now the beginning of the game should be a bit easier, but you will still feel the need to improve your nuked homeworld as soon as possible by researching Atmospheric Manipulation.
Note: the pre-sapiant irradiated trait now only provides habitability bonus on Tomb class worlds.

Changed planet icons to standard vanilla style, as I believe more people may prefer it this way. But do not ask me why a Retinalgenian looks green.

Sub-mod related update.

City world bug fixed, new game is not required.

Also included in this update are changes I've been working on as part of the upcoming sub-mod. You should notice at least the new Atmosphere modifiers:

All standard habitable worlds start with one of several optimal atmospheres (green ring), they dynamically affect habitability between 0 and negative 15% depending on your homeworld's atmosphere. Marginal worlds start with either a marginal atmosphere with a yellow ring that dynamically affects habitability between negative 15 and 20%, or a Sub-marginal atmosphere with a red ring which has a fixed negative habitability of 25%.

You will be able to change the atmospheres with the new sub-mod.

Fixed Ringworlds and other megastructures, this was actually already done but my changes were not overwriting vanilla. Rings and some others should no longer be allowed to be built around all types of binary and trinary systems, and the Arc furnace requires a magma world with the Molten class modifier;

Retinalgenian spawn chances moved back to red and orange stars as well as with the Dim Star alternate home system;
Photosgenian alternate homeworld moved back to the Bright star alternate home system.

Xirosorimos homeworld graphical glitch hotfix;

Ecumenopolis adapted.

Hotfix:

Artificial Atmosphere given 10% habitability bonus, this affects Gaia and Relic worlds for now;
Marginal and Sub-marginal mega projects will now remove any existing orbital station after being completed.

Likely save game incompatible.
Planet portrait changes and additions (causing the incompatibility with older version games);
New biosphere level;
New atmosphere modifiers added to dynamic habitability (why you should start a new game anyway);

refer here for more information:
https://www.patreon.com/posts/atw-main-mod-105762833?utm_medium=clipboard_copy&utm_source=copyLink&utm_campaign=postshare_creator&utm_content=join_link