Introducing SuperTuxKart's new graphical engine

The art challenges the technology, and the technology inspires the art.

John Lasseter Chief creative officer at Pixar

One complaint we have heard a lot over the time we have been working on SuperTuxKart is that the graphics are not really good. "The 3D graphics aren’t fantastic (think Mario 64, circa 1996, rather than anything more recent)" was written on BritishComputing about SuperTuxKart, or "Graphically SuperTuxKart is not impressive, but it has that charm that I liked so much about the older 3D games" in FamilyFriendlyGaming. And while there was a fair improvement over the original TuxKart, we always have been aware of this fact.

Luckily, being able to become a mentoring organisation in GSoC 2013 gave us an opportunity to work on that, and we can now say to people not liking the graphics: "You have been heard."

Out GSoC 2013 student Lauri Kasanen started to improve Irrlicht, which is a third-party open source rendering engine we have been using since STK 0.7. He added support for shaders, and a lot of additional features to be used by track designers (any regular reader of this blog should be aware of his very interesting blog posts during his development, see our blog posts around July and August 2013). After GSoC 2013 Vincent LeJeune took up the torch and started to write a new engine to allow new effects and more complex tracks.

We could list here all of the awesome new features like Dynamic light or Image Based Lighting. But it would be pretty boring so we have made a showcase:

Unfortunately YouTube's compression doesn't show the best side of our improved engine. So here additionally some high res screenshots of the look you can expect the next release of SuperTuxKart will have:

Lights in Old Mine

Shadows in the new Chocolate Track, which is a replacement for the Amazonian Journey

Blackhill Mansion in new and improved eeriness

Different part of the new Chocolate Track

We have also started to create a new coherent universe and a new style. This will help people's creativity and increase cohesion among tracks. I have been busy with adding Easter Eggs and various hidden references to the tracks. Admittedly you will have to look for sometimes rather hidden details, but here a few snapshots of the details you might spot: 

A fictional company, Nolok industries

Sara's coat of arms

Paulo Riviera, the president of Val Verde, a fictional country in South America

As you might have noticed, the style has changed quite a bit: STK will look like hand painted concept art, with bright colors and mostly hand painted textures:

Example of a wooden texture

While all of this makes us of course very excited, there are a few caveats: to really enjoy STK in its new and shiny glory, a reasonable powerful graphics card will be needed. For all existing users with not exactly latest computer models at hand, don't be afraid: we will still support low end graphics card, but you will have to make some compromises (at this stage Vincent is mostly fighting with bugs in the various graphics driver out there - and let me tell you, there are many). Graphical features can be enabled and disabled to allow nearly everyone to enjoy STK at good frame rates. We intend to publish a pre-release version of STK to allow us to gather some statistics about various graphics cards and performance, driver issues etc, so that we can have some proper guidelines at hand for the release.

The more immediate problem: converting all our tracks (or even better making new tracks) to not only support the new engine, but to use the new features and look really good is a lot of work. And at this stage it is only me doing all of this. So, if you are a Blender user (or know someone) who is looking for some interesting projects to work on, or are skilled with creating textures, please contact us. Typically, IRC is the best option to get some immediate feedback.

At the moment we can't really tell you when the next release of STK will be ready, but it is more likely a few months away (mostly depending on how much time we need to convert tracks, though the main developers of STK are also busy with the next 5 GSoC students who will work on STK). As always, any support is appreciated and can help us with the next release.

Jean-Manuel Clémençon | Lead graphics artist

French translation available here 

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