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Very impressive article Jake! You are very talented.
nice article! i love seeing the breakdowns.
Sébastien Van Elverdinghe has recently talked to the Quixel team about his experience creating complex materials using the recently released Mixer.
I’m Sébastien Van Elverdinghe, I’m from Brussels, Belgium but currently live in Stockholm Sweden where I’m working as environment artist at Starbreeze Studios on the upcoming Overkill’s The Walking Dead. Furthermore, I’m also behind some of the recent medieval Megascans tileables.
I have been scanning for several years now, especially focusing on tiling materials.
Recently I had a lot of fun mixing some of the medieval Megascans into brand new materials with Quixel Mixer. Today I’m going to break down and detail my process step by step. I’ll be focusing on this muddy path material.
Thanks to Megascans we can use ultra photorealistic materials that give incredibly believable results. However you have to keep paying attention to the way you are mixing your materials together. As always references are key. I actually had a hard time finding actual photo references for this specific material.
What I wanted to create here is that typical -supposedly paved but in reality more of a mud field- path I used to hike on in countryside United Kingdom. Sounds very specific, but trust me if you have been in the UK, you’ll relate to this for sure.
Furthermore, it’s also the kind of material that wouldn’t be out of place in a very muddy WW1 battlefield environment. I’m going to be drawing a lot of references from memory, which is far from ideal, but also came up with a -very- little moodboard.
The idea is to decompose the results into the different layers that you will add in a chronological order. In this case I will have my base bricks, some mud and finally the water.
I also increased the height intensity a bit to make it look more dramatic
It looks a bit too “stony” and not wild enough, let’s add some wild grass. I want it to roughly be on the cavities, but with a pretty wide radius. I also want to keep the stones displacement as much as possible, that grass is going to be trampled under a lot of mud after all. I’m therefore wrapping it to the base. I also adjusted the albedo and gloss to better match the stones, I’m going to be doing that for each layer as I add them.
Now let’s tackle the mud. The same way we decomposed the different layers that compose our material, we’re going to decompose the different layers that compose our mud. We are going to start from the oldest to the more recent. So let’s add some old mud, think of it as a thin layer that stays permanently even when dry and is more spread out than the core of the mud. It will cover most of the grass we added just before, and that actually makes sense.
Next, I want to add some “impurities” such as little leaves and branches, there is an amazing atlas called Forest Floor Mulch that is perfect for that. Definitely one of my favourites, I have used it in nearly all my ground mixes.
The reason I’m adding it now is that I want it to be above the old mud but below the fresh mud.
Now let’s get to the real part, the actual mud! I have used the Deep Trampled Snow for this, but tinted it the same color as the mud.
You may be wondering where the deep footprints are. Well, the reason they are not showing up is that there is no hole deep enough for them to form. And that’s where the paint layers come in action, we are going to carve some stones out to create deep holes for the mud to accumulate.
Again you need to think about the layer order here, the holes have to be below the mud, and so does the paint layer. It is therefore put between the grass and the first layer of mud we added.
Now just have fun digging some holes! Try to keep the tiling patterns in check using “T”
Now that’s much better! Let’s add the final touch, the water! For that we are going to add liquid layers, it’s probably the most powerful layer type and definitely the most fun to use.
Again we need to decompose it, this time in two layers, damp and wet.
First, let’s make the damp mud. Create a liquid layer and bring its threshold down until the last puddle disappears. Then play around with the moist settings. What I wanted to emphasize here was that the highest parts of the mud would already be dry while the rest stayed damp.
Furthermore, wet mud is very malleable, it, therefore, softens when wet, you can reproduce this by increasing the blur value a little.
And, finally, let’s add the actual puddles. Add another liquid layer and drag the threshold until you reach the level you aimed for. The water being dirty, it shouldn’t be see-through at all.
It’s very tempting to make the material super wet just because it looks so good. However, if you plan on tiling it be careful and make sure the patterns aren’t too obvious. I decided to stay quite subtle for that very reason. You could also go back to the paint layer and add some more holes as well or adjust the existing ones.
I haven’t used any decals here, but add some if you feel like it!
Lastly, individually check and adjust the albedo and gloss for each layer until they all work together.
Quixel Mixer is so incredibly fast and powerful that it actually took me as much time to gather references than it took me to create the mix! I think the key to believable materials is to deconstruct them in all the needed layers and add them in the correct order.
But at the same time pay attention to the “happy accidents” they can happen when you least expect them, you just put a layer in the wrong place and it suddenly looks awesome.
I’d also encourage you to think materials out of the box, it’s not because it’s called concrete that it couldn’t make some amazing dirt with a bit of tweaking.
Lastly, I’ll repeat it again, pay attention to tiling if your material is supposed to tile. It’s so easy to get carried away with a super awesome material and then realize it doesn’t tile all that well, run a “tiling check” after each layer you add.
It only takes a couple of hours to get familiar with the whole process and the possibilities are endless!
Thank you all and happy mixing!
Sébastien Van Elverdinghe, Environment Artist – Starbreeze Studios
The article was originally published here.