Terrain Physics Blog

Hello SnowRunners!

Let’s talk about terrain.

SnowRunner has evolved considerably in every department since MudRunner, and when it comes to terrain physics and its behaviour in relation to vehicles, our goal is to be at the top of the industry. To illustrate our efforts in this department, we’re excited to share the details of how we’ve both expanded and deepened the terrain physics in SnowRunner.

Driving in mud

In SnowRunner, there are extrudable surfaces (grass, dirt, sand, etc.) and non-extrudable surfaces (asphalt, concrete, rock, etc.). Extrudable surfaces all have a different base viscosity, meaning that you’re more likely to get stuck when driving on sand compared to driving on grass, for example.

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Note: this is new to SnowRunner; in MudRunner all surfaces had the same base viscosity.

Additionally, viscosity is higher where ground looks darker (has a dark tint). In MudRunner, tint had two colors (brown for grassy surfaces and greenish for others). In Snowrunner, tint is painted with a colored brush, but the idea is the same (darker = more viscosity and a higher chance to get stuck).

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Another thing that changes the way vehicles dig into terrain is so-called “extrusion data”. You can’t see it in the game, but map creators can paint it with a special brush. It’s often used to make swamps, mud roads, or other hard-to-pass routes actually difficult to traverse.

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Note: SnowRunner improves on MudRunner in that those “hidden extrusions” can’t be too deep for certain ground types (i.e. grass that looks dry and solid), making driving more predictable.

But what is fundamentally new in Snowrunner, is the “wetness mask”. The map author paints it with a special brush, making ground look wet where it should (in MudRunner the ground looked dry everywhere).

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The wetness mask affects viscosity in the same way tint does, so you are more likely to get stuck on wet surfaces.

Driving in snow

Snowy surfaces can have different snow depth. You can’t see it in the game (snow depth is painted in the map editor with a special brush), but vehicles behave differently depending on the depth of the snow it’s driving over.

When snow depth is zero, you will see your wheels digging into the mud. When driving in deep snow however, you will see snow chunks flying from under your wheels, and your vehicle will behave differently. This means that the vehicle will sink into the snow until it reaches the ground below.

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Note: Off-road tires improve vehicle off-road capabilities for both snow and mud environments.

If the ground below the snow is non-extrudable (i.e. snow bank on asphalt), the vehicle will sink no further.

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Additionally, deep snow always behaves like a surface with high viscosity, so snow that looks “darker” (has dark “tint”) isn’t more difficult to traverse, unlike mud.

Note: There is no “wet” snow, as the wetness mask is ignored for snowy surfaces.

On winter levels, non-extrudable surfaces painted over with the wetness mark acts as ice. Vehicles will slide naturally on ice, unless special wheels are installed.

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For both and snow and mud environments, there is always a trade-off between vehicle mass and its off-road behaviour. Loaded vehicles will sink deeper, but the wheels have better traction with the ground.

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... but only if the mass is distributed properly!

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Driving in Water

Water in Snowrunner, as in Mudrunner, can flow at different speeds. When crossing a river, natural rules apply - heavy vehicles are less affected by the current and lighter vehicles are more prone to floating and capsizing.

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New in Snowrunner is that vehicles can be equipped with different snorkels that change the maximum water depth that a vehicle can traverse before taking damage.

Thank you all for reading our blog on terrain physics, we hope you’ve enjoyed it! We can’t wait for you to discover and explore the varied environments of SnowRunner with our huge roster of vehicles.

See you in the snow!
Pavel Zagrebelniy - Original Game Creator

last edited by Jellyfoosh

Thanks so much for this!!! 😃

Can't wait to get my hands on maptools!
So much options!
I hope there will be also a rich library of objects!

@Sodoma said in Terrain Physics Blog:

Can't wait to get my hands on maptools!
So much options!
I hope there will be also a rich library of objects!

I agree! 😃

last edited by 8x8

@Jellyfoosh
Thanks for the breakout session in mud and snow behaviour, but thoes the axels of the trucks now collide with the surface (mud, snow, rocks, branches?)

last edited by Eversman

But as long as it is very nice to see improvements on mud, I hope for next presentation being about improved drivetrain 😇

This is what we wanted to see long time ago...details. Thank you for this info and I hope we can see a gameplay video soon. So far the game looks awesome , way better than Mudrunner.

last edited by TheDeestroyer

Amazing! just amazing.

@Unster @zamal Come check this out.

Only thing left to mention is "Traction in asphalt"

Spotted a typo in the above post though... the word "until" has two "l"s. 😛

Great update! Thx Pavel!

i love he is fully responsible for physics, no worries that sr will be more arcade than mr!

i like deep (average) snow shown, hope really deep will be in game too (as shown on early pic with chevy)
wet tarmac=ice?...its a too raw simplification, its ok for this time since its impossible to reach an ideal..)

cant wait to spend all my fuel for moving trailers full of concrete piles! max load, great fun! i hope someday we will have tire wear, so after several such missions you need to invest into new set of tires...as well as maintenance and other parts...but its diff story)

wet or not wet map predefined sectors - doesnt it mean that we WILL NOT have weather system?...(

last edited by Stazco

@Stazco said in Terrain Physics Blog:

Great update! Thx Pavel!

i love he is fully responsible for physics, no worries that sr will be more arcade than mr!

i like deep (average) snow shown, hope really deep will be in game too (as shown on early pic with chevy)

wet or not wet map predefined sectors - doesn't it mean that we WILL NOT have weather system?...(

Probably, yes... unless that's just spots which are always wet.
Also, one question I have: Will we have attachable snow plows too, which will actually be able to clear the snow, and preferably blast it into the back of the truck, and the unloading it somewhere else? Questions, questions... 🙂

@8x8
i saw huge plow on one trailer in pics...how its operated?..

@Jellyfoosh
please tell Pavel we really appreciate all this extrudable magic, really!!! but ask him to let all deformations made by us be saved during all current map playthrough! no map RESETS after each game or console restarts! please!!

This looks sooo promising. Keep up the good work!

@8x8
Displacing large amounts of snow with something like a plow is not currently a planned feature. The focus is on how the snow and its depth affect the vehicles.

@8x8 Only if you're talking about tilling land, and this aint Farming Sim 😉

Well it could be nice feature, to be able to plow out a mud, stiffen road a little...
But I am afraid that many people will end up with se
veral runways - the end 😃

Can I just say... Simulation GOTY. This looks crazy amazing!! Can't wait to get my hands on it and can't wait to see the rewards bestowed on your game for all y'alls hard work! @Pavel

@Stazco said in Terrain Physics Blog:

@8x8
i saw huge plow on one trailer in pics...how its operated?..

Ah, must've missed that. Thank you for mentioning it though.

@Stazco said in Terrain Physics Blog:

@Jellyfoosh
please tell Pavel we really appreciate all this extrudable magic, really!!! but ask him to let all deformations made by us be saved during all current map playthrough! no map RESETS after each game or console restarts! please!!

I agree! Huge thanks from me as well! 🙂

@bastilimbach said in Terrain Physics Blog:

This looks sooo promising. Keep up the good work!

Indeed it does! 😃

@Jellyfoosh said in Terrain Physics Blog:

@8x8
Displacing large amounts of snow with something like a plow is not currently a planned feature. The focus is on how the snow and its depth affect the vehicles.

Only if you're talking about tilling land, and this ain't Farming Sim 😉

Ah right, I see...
Yeah I wasn't talking about tilling land, I was thinking more like snow-clearing jobs perhaps to get in-game cash. But thanks for the info though! Very much appreciated! 🙂

last edited by 8x8