Project Zomboid News

Hey all, we have just moved Build 40 into the wider IWBUMS public beta – which contains Turbo’s weather and climate system (proper seasons, new shaders, fog, mist, storms that move over the map etc), vehicle improvements and an awful lot of gameplay tweaks, balance and bug fixes.

A brief ‘highlights’ changelist can be found below, while the full changelist can be found here. Please leave feedback in the thread, and bug reports here. Details on how to join the public IWBUMS beta can be found here.

Some quick housekeeping notes on this build:

• There
• might* be an annoyance with players still getting wet and feeling temperature effects in vehicles, though this will be patched pretty soon if so. Likewise, – the general impact of temperature on players will be balanced over the course of the IWBUMS beta.
• This version has various aspects of car integration converted into Lua so that modding full cars, not just changing skins, is now a lot more viable for modders. Yuri has written detailed guidelines which RingoD has posted up here, and we’ve also included a new script to help you convert textures into PZ’s required form.
• A lot of engine work and general vehicle improvements have carried on into this build, but still require substantial testing on servers – not to mention a lot of improvements and fixes we’ve been making to MP Admin in general. Feedback on MP, and especially people connecting to distant servers, would be much appreciated. We will be bringing our own public SpiffoSpace IWBUMS test servers online next week.

(For full changelist, and to provide feedback, please visit this thread on the forums. There are many, many other fixes and balance improvements.)

• Full weather and climate simulation system recreating true-to-life weather patterns through 365 days of the year. Morning fog, thunderstorms created by virtual weather fronts that move over the map, improved rainfall visuals, visible snowfall and improved rendering to better evoke the time of year, and the time of day.  New SFX. New player character temperature system.

https://www.youtube.com/watch?v=MLg4pLyrrWQ

https://www.youtube.com/watch?v=aJVLFNxlhTI

• New MP Chatbox. Primary features include separate chat streams (safehouse, local, global, etc), customizable chat and more intuitive usage and commands. It’s hopefully a lot more convenient now.
• New ‘A Storm is Coming’ and ‘The Mist Descends’ scenarios
• New system to convert objects placed by mappers so they can be used as functional game objects. This covers items like barricades, campfires, rain barrels, traps, composters, crops etc.
• Winter is Coming game mode now works with new climate system. Seasons still impact on this mode – ‘Summer’ highest temperature is 0 degrees centigrade, and winters may drop to -30. After 3 full days a powerful weather period is generated, that will always feature a blizzard.
• New MP Admin UI additions including an Items list viewer in the admin panel that can be used to quickly search through, and spawn, items. Also includes the functionality to change in-game settings on the server that don’t require a restart, and clear ways to change admin powers within the UI so hosts can remain admins and play along without advantages.
• Improved car handling. New driving traits. New car-battery charger item that’s placed on the ground and interacted with using a context menu. Drunk moodle now has an impact on driver steering input. Players can now be harmed when hit by a car.
• Car wrecks can now be dismantled with propane torch and a welding mask. Gathered metal material will depend on your metalwork skill.
• Many UI changes to handle different font sizes. Added context-menu font-size option. Re-exported the map to improve zombie density in some farmland and rural areas.
• Changed First Week and One Week Later and adjusted settings to make sure that new players aren’t given too easy a ride. Removed Initial Infection.
• Added Display option to disable the new roof-hiding feature for low-spec users. Updated menu screen with vertical rather than horizontal options – due to problems with taskbar in latest Windows Updates.
• Added chevrons on character screen next to the weight to indicate if weight is increasing or decreasing.
• New isoRegions system to detect an enclosed area – player-made or dev-created – to keep weather effects on the outside.
• New functionalities for the PZ sound system. Formerly modders couldn’t override sounds in PZ FMOD soundbanks, so when players find certain sounds are too loud or annoying (heartbeat, zombie alert, flies, level up noise etc) it was hard to raise/lower them independently. Details about all the game sounds now go into media/scripts/sounds.txt. A new in-game UI allows users change the volume of any sound they feel is too oppressive.

Again, fuller examination of what’s in the changelist in terms of balance and fixes in this thread on the forums.

We’ve just updated the public weather build beta to version 40.7, which will probably be the last one before we widen it out to the more heavily subscribed IWBUMS public beta channel. (Steam beta password is ‘weathertestbranch’ for those wanting to check it out.) Primary new features in this include:

• Turbo has hooked the Winter is Coming game mode to the new climate system. After three full days of preparation time a powerful weather period is generated, that will always feature a blizzard. The mode will still follow seasons, of a sort, with the mode’s ‘Summer’ having a high temperature of 0 degrees centigrade, and the ‘Winter’ dropping to -30. A time-lapse of the initial Blizzard in Winter is Coming can be seen below.

https://www.youtube.com/watch?v=bSemqtKJA5Y

Before the public release of this build we will likely also add in an Endless Night and Mega Stormy scenarios too (names placeholder!), and likewise experiment with zombies being attracted to the rumble of thunder.

• Placeholder moodles have been added to show the ‘heating up’ and ‘cooling down’ of player temperature, but this will likely change to being shown on the player health screen. We don’t want this aspect of the game to become too distracting and micro-managey, and don’t feel that an over-population of the moodles is entirely the way to go. [In the meantime, however, they are quite useful for tracking impact of the WIP system. This build hopefully nerfs some of the more extreme impacts of temperature too.]

• RJ has coded a new MP Admin UI to help server owners quickly search through, and spawn, items. It looks a bit like this.

• Stas has continued to update his new chat system – and this version has a bunch of bugs fixed that have arisen in testing, alongside a much neater fade-in and fade-out for the input field.

• New car stuff: When dismantling a car wreck metal items are now spawned on the ground instead of player’s inventory. The player can also now sleep in a car that has its engine running, and Turbo has also played around with the visibility cone when driving through more intense weather effects.

• General Arcade’s Yuri has also exposed various elements of the vehicle code to modders, essentially rewriting stuff like LoadVehicleModel and vehicle spawn governance, in lua. This will aid modders who want to add in new/individual cars to operate alongside the existing ones of the vanilla game. He has also written a guide for this, which will go onto the forum in the coming week.

The full changelist for 40.7, which also contains a lot of handy fixes and tweaks, can be found here. If you missed the full current changelist for the version 40 weather beta last week then that can also be found here.

[As mentioned in the last blog this build also contains a system that converts items placed by mappers into in-game objects, the rethought soundbank system, an improved car battery charge system, in-game sandbox options for MP admins more readable fonts and players damaged by vehicles in MP.]

Elsewhere we had a productive anims meeting with Bitbaboon Mark and the team at TEA this week, with work like a tidy-up of the state system, improved documentation of current player functions, a motion extraction build for Martin the Animator to play around with and an investigation into depth buffer usage to help with model issues all now being worked on over in their HQ. (None of it sexy stuff, but all of it necessary and in good hands.)

Meanwhile RingoD is now helping out Mash when it comes to Louisville, and in particular the suburbs, creating house variants on what we already have in-game so that when the larger urban area finally arrives (as we’ve said before, this is a huge project so will be several public builds away at least) the expanded number of buildings won’t feel cookie-cutter.

This week’s roof garden from Eddie. A general list of stuff added to PZ, and vids of features being worked on, is kept here – so you don’t have to plough through endless dev blogs for info. The Block of Italicised Text would like to direct your attention to the PZ Wiki should you feel like editing or amending something, and the PZ Mailing List that can send blogs like this and patch notes direct to your mailbox. We also live on Twitter right here! Our Discord is open for chat and hijinks too.

Welcome to this week’s Thursdoid! (Last week's Thursdoid can be found here) We’re a bit light on the team this week as a few of us (including, as you can probably guess, the developer in charge of Thursdoid punnage) are having a well deserved holiday after the exhausting and mega stressful vehicle push for so many months finally came to an end, and like buses several of those holidays coincidentally happened to come at once, but still a few things to report.



We’ve just updated the weather branch. The main addition is the first version of our overhauled multiplayer chat system developed by Stas at General Arcade. The new chat is a bit fancier and more functional and more in line of what you’d expect on an MMO or similar types of games. You can activate the window to chat by pressing T or Enter. Let us know how you get on with it and if there are any problems

Various fixes include reintroducing the low lighting mode, and an option for disabling the new building hiding system, which will provide better performance on low end machines (more on this subject in a moment), removed the weird sound echoes, various Linux compatibility / java fixes, fixed multiplayer zombie attacking / defending issues, and many more. We’ll try to get you a complete change-list soon.

Work continues apace with animations, nothing flashy to show or talk about, but many fixes have been made to the tool and Martin the animator now has access to regular builds to help integrating all the anims. Steve at BitBaboon nears completion of the new build system overhaul, which will vastly improve our internal organisation of builds, and should allow us quicker testing and releasing of builds. With this we’re making wider changes to the team organisation to help us deal with the bigger team size and the various irons we have in fires.



We’ve had a small number of people reporting that cars are invisible on their low end machines. This is due to the fact that the way the vehicles are rendered require shaders to overlay damage and other effects, so cards that are unable to use shaders, as with the 3D characters which use GPU skinning, will not be able to render the vehicles.

We’ve fought for many years to keep our minimum specs where they are, wanting to keep our potato running Zomboiders in the game for as long as possible. However, as the years progress, the numbers dwindle as more people upgrade, and at this point we’re talking about an extreme minority of PCs, bottom end Intel laptops any of them close to or over a decade old, at least in terms of technology, and constituting less than 1% of all our customers – It’s gotten to the point where retaining compatibility with machines mostly over a decade old is starting to hamper development in several ways.

1) For example to add support for vehicles for this minority of machines, including testing and bug-fixing would take a substantial amount of development time, which at this stage could be spent working on the features, optimisations and improvements the vast majority of our customers would benefit from and that would take us toward the fabled 1.0.

2) There are a whole host of avenues for optimisation that we’ve for a long time written off because they would end up raising the minimum spec by requiring shaders to work and would be too fundamental to switch off. Since the game and simulation have become massively complex at this point, optimisation is becoming ever more important. Vehicles at one stage ran so badly on top end machines that we simply had to spend significant time doing extreme and very disruptive optimisation work, and the game still doesn’t run adequately in built up areas on machines that should on the face of it be able to handle it.

However the available routes for optimisation are becoming extremely sparse–there’s only so much blood you can wring out of a stone and we’ve shaved practically every millisecond we can from the game’s frame time, so we really need new directions to be able to explore to keep the game running well particularly when features such as Louisville, the new animations (which will bring performance benefits and pressures, and it’s unclear what the net result will be) and of course the NPCs go into the game.

The way the rendering system works with the lighting, shading and isometric perspective is hugely costly and it’s difficult to see how it can possibly be improved having no guaranteed access to literally any of the rendering advancements developed in the past 13 years.

Having guaranteed shader support will open up many optimisation opportunities in the future, our rendering being far and away the biggest bottleneck, and there comes a point where it becomes unfair to the huge majority of our customer-base not to exploit these. While it’s frustrating the game not running well on an old laptop, it’s certainly much worse for it not to run well on a top of the range gaming PC and that’s something we have more responsibility to fix and avoid in future.

So while we understand this decision will upset a few of you (though it’s a decision we hope you appreciate we did not take lightly, and resisted as long as humanly possible to give as many the opportunity to upgrade as possible), we hope that the few affected by this understand why we’ve come to this decision. In the meantime, build 38 will always be available via the Steam betas, and there are many affordable old laptops with GPUs that have the requisite shader support, so hopefully we’ll see you back in the new builds before long.

This week’s tense disagreement from QwencGames. A general list of stuff added to PZ, and vids of features being worked on, is kept here – so you don’t have to plough through endless dev blogs for info. The Block of Italicised Text would like to direct your attention to the PZ Wiki should you feel like editing or amending something, and the PZ Mailing List that can send blogs like this and patch notes direct to your mailbox. We also live on Twitter right here! Our Discord is open for chat and hijinks too.