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HOI4 Dev Diary - Acclimatization and Special Forces

Hi everyone and welcome to another dev diary where we show off stuff as we work on Waking the Tiger. Today we are going to be talking about a feature I’ve been wanting for a long time - troop acclimatization.


Acclimatization
We have long wanted to simulate the problems associated with shifting troops to new fronts with more extreme weather they are not used to. We currently have two types: Cold Acclimatization and Heat Acclimatization. It is not possible to be acclimatized to both at the same time, so if you take troops from the desert and put them down in the Russian winter, they will need to “work off” their heat acclimatization first before they start getting accustomed to the cold. When a division is sufficiently acclimatized, it will change its look, as you can see below. On the left are troops in winter with no acclimatization and on the right is what they will look when acclimatized.
Screenshot_1.jpg

And an example from Africa:
hoi4_4.jpg


For most countries, we do this by switching the uniform on the 3D model to use more appropriate textures. In some cases, like where people only had tropic uniforms with short pants and the like, we replaced their uniforms to be more winter appropriate (suggestions by the art department to simply color their knees blue were sadly rejected). The new textures come with the DLC, but the core mechanic is free as part of 1.5 Cornflakes. You can see your acclimatization status as part of the unit list and its effects:
Screenshot_2.jpg



With full acclimatization you will reduce extreme weather penalties by about half. We will also be increasing the impact of harsh weather a bit to compensate for being able to avoid it now.

There are a few things that will help you gain acclimatization also. If your commander has the Adaptable trait or Winter Expert it will speed things up. There are also technologies that influence the acclimatization speed (more on that later).
upload_2017-12-6_14-41-16.png



Special forces
Up till now, we have had a bit of a balance issue with Special Forces (Marines, Mountaineers, Paratroopers). They were, pound for pound, better than regular infantry and many people simply replaced all their infantry with mountaineers.

To make sure special forces stay special, we added a restriction based on your whole army:
Screenshot_3.jpg


To ensure that you always know how many special forces you can field, the division designer and deployment will help you keep track:

Screenshot_4.jpg


Along with this change in how Special Forces work, we wanted to make them stand out a bit more. Six new infantry technologies have been added to improve these elite troops.

Special forces are trained and equipped for conditions that ordinary soldiers aren’t expected to excel in. The first tech will give them a boost to acclimatization speed. Afterwards, the tree splits. One option is to train your special forces harder, to improve their skills and their ability to fight for longer before having to be resupplied. The other option is to expand the special forces training programs to accept more recruits. Your special forces will be more numerous, but come with more drag and not quite as high speed. In the end though, they will still be elite forces and will be able to develop training to make them even more skilled in fighting in the harshest of conditions.

Screenshot_5.jpg


See you all next week when we return to take a look at the Chinese warlords.

Also, don’t miss out on World War Wednesday today at 16:00 CET as normal. Me and Daniel will continue our fight against communism (or the British fleet… we are still arguing about that) as Germany under the rule of the Kaiser.
 
Special Forces: How are the number of battalions allowed determined? Will the base be different per country or will everyone have a set % based on total troops?
Also, while I understand the need to stop the SF spam, from a design perspective, why go with a cap instead of a cost approach?
Late game the cost wouldn't really stop anyone...
 
So the soviets will have a advantage at the start of the war on the cold Eastern Front!
Nice!
PS: a bit harsh on the 5% battalions SFs, but i suposes a SF battalion will more valued
Keep up the good work and all the best guys
 
I hope we can see specialized Jungle Troops, Desert Troops, Arctic Troops, Rangers(Tank Hunters), Stormtroopers(Not the Imperial Kind), etc. In that same vein perhaps we can get some flavor names for certain nations, like Germany's paratroopers being renamed to Fallschirmjäger and Rangers being Panzerjäger; British special forces can be renamed commandos and Soviet to Spetznaz
Stormtroopers instead of space marines
 
Do the Org regain penalties and other combat related modifiers get lowered too?
 
oh I probably should have explained that more. Its visible in one of the screenshots with the tooltip. Being in the area with those effects will see you gain acclimatization. If you are actively fighting it however goes much faster

Very good idea with acclimatization. Well, if this idea continues to evolve. In addition, you can later add depletion from disease! And also the development of immunity to them. (jungle and swamp).
 
oh I probably should have explained that more. Its visible in one of the screenshots with the tooltip. Being in the area with those effects will see you gain acclimatization. If you are actively fighting it however goes much faster

Does training in a hot or cold area effect the speed at which its gained?
 
I'm not feeling it at all. I just don't think my style of play lends itself to using these additions very often. To me thus far as I understand unless I'm rushing troops from the desert into a blizzard I'm going to have to wait "X" amount of time before they are 100% to fight? Um, ok. For how many countries? Germany &?
I don't know, it just seems to me this will be a seldom if ever used feature and when it is used it boils down to a time delay to wait for new uniforms to arrive? Again realistic but how often will it ever be a real factor of any type?

What deserts are we talking about here?
How much is this going to further handicap the AI? Is it going to be able to recognize any of this? How much front shifting will be going on because of it?

I see this as an option that will be exercised very rarely.
 
It is my understanding that acclimatization represents the way the soldiers and their organization gets accustomed to extreme weather through their lived experience. However, if a division is inflicted with large losses of men (that had adapted to fight in said weather) will the acclimatization of the division decrease as new unexperienced recruits join the ranks in a similar fashion as Division Experience?
 
I'm not feeling it at all. I just don't think my style of play lends itself to using these additions very often. To me thus far as I understand unless I'm rushing troops from the desert into a blizzard I'm going to have to wait "X" amount of time before they are 100% to fight? Um, ok. For how many countries? Germany &
Japan
 
I guess the 5% limit isn't set in stone. Still, I'd rather have too few special divisions than too many. Makes for a more interesting choice.
I'm guessing it would be possible to add a Guard battalion and let it also count towards the unit limit? As a way of modeling elite troops, while still keeping it balanced?
 
I'm not feeling it at all. I just don't think my style of play lends itself to using these additions very often. To me thus far as I understand unless I'm rushing troops from the desert into a blizzard I'm going to have to wait "X" amount of time before they are 100% to fight? Um, ok. For how many countries? Germany &?
I don't know, it just seems to me this will be a seldom if ever used feature and when it is used it boils down to a time delay to wait for new uniforms to arrive? Again realistic but how often will it ever be a real factor of any type?

What deserts are we talking about here?
How much is this going to further handicap the AI? Is it going to be able to recognize any of this? How much front shifting will be going on because of it?

I see this as an option that will be exercised very rarely.

THis isnt a Feature you can choose not to use. It's simply there. Your dudes fight or are stationed in the desert and hot climate? They get accustomed to it. You redeploy them to Siberia? Well you will have to work with that malus.. or wait.
 
A thought that came to mind:

Can cavalry brigades be included in this special forces limit? If you go to war very early, making your army into all cavalry is not unheard of. This is unrealistic for obvious reasons since there is a practical limit to how many horses are available outside of the logistics supply chain.

Even Poland with its emphasis on cavalry as their elite forces only fielded around 10% of its army as cavalry.
 
A thought that came to mind:

Can cavalry be included in this special forces limit? If you go to war very early, making your army into all cavalry is not unheard of. This is unrealistic for obvious reasons since there is a limit to how many horses are available outside of the logistics supply chain.

Even Poland with its emphasis on cavalry only fielded around 10% of its army as cavalry.
What if we are playing Mongolia? :D
 
I understand, but still, special forces are now limited to 5-10% of the army. I don't see myself researching 6 additionnal technologies to improve a fraction of my infantry.

Is there a particular reason not to merge them with the current special forces upgrades? Balance?


Well it sort of depends doen't it. How long it takes to research it? It's just a matter of balancing isn't it?
 
A thought that came to mind:

Can cavalry be included in this special forces limit? If you go to war very early, making your army into all cavalry is not unheard of. This is unrealistic for obvious reasons since there is a limit to how many horses are available outside of the logistics supply chain.

Even Poland with its emphasis on cavalry only fielded around 10% of its army as cavalry.

Cavalry already doesnt get any boni from any doctrines and Inf or Mot/mech Upgrades. They effectively become very week once you hit move into 1939+. No Need to cripple them even more by adding them to "Special Forces".