Unity 2018 - Game VFX - Weapon Trails / Slash Tutorial

Unity 2018 - Game VFX - Weapon Trails / Slash Tutorial

This video shows you how to create a Weapon Trail, Slash Effect, Hand Trails or a simple Trail vfx. This effects have an enormous use in games and can be attached to Characters, Vehicles, Swords, Axes, Knifes, etc.

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Enjoy and feel free to ask any questions you may have, I'll answer as quickly as possible. And don't forget to like and subscribe. Thank you!

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Slash

[GabrielAguiarProd]

Quick tip for a performance improvement.
Increase the value of 'Minimum Vertex Distance', in the 'Trails', since lower values generate more triangles.
Cheers, have a blast!

[creationsmaxo]

Great tutorial in general!
Obviously, as it was made in Unity 2018, there are some changes/issues if anyone is using Unity 2019 or 2020 as the particles system got a bit of an upgrade.
In 2019 and 2020, to make things works as shown in the video, there are a few changes (as well of possible optimization) that has to be made.
Here's a quick list of the changes and why they are necessary in 2019 and 2020:

*• Change Start Speed to 0*
Prior to Unity 2019, the "trail" option was, by default, only using the movement of the system to generate the particles and was ignoring the start speed. Since Unity 2019, the start speed is now active and this will make the particle active toward a direction regardless of the movement. (In other words, it's ugly.) Since 2019, setting Start Speed to 0 makes it so that any generated particles are truly at the position of the object in space during their lifetime.

*• Use Rate over Distance instead of Burst & Rate over Time*
This is more of an optimization than a change. Using Burst & Rate over Time means that the weapon will ALWAYS generate a trail even if it's not moving. That's approx. 80 faces per weapon (if you limit things to 40 particles) Using the "Rate over Distance" not only allow the particles to be only generated when the weapon is in movement, but it's also allow you to use fewer particles as there's far fewer chances of getting the small bits where the particles aren't enough present. It does requires a bit of changes to the lifetime.
Using the settings shown in the video gives me approx 55-60 particles at a time.
Using Rate over Distance (20), lifetime of 0.2-0.6 and start size of 0.05-0.2 gives me around 38 particles at most at a time.
This might sound small, but that's a 30% lighter trail on the CPU and, if applicable, GPU and it's 99% lighter if the object doesn't move as particles are only generated when in movement.

*• It's better to use a texture that is tiled horizontally*
This is more of an artistic and technical thing, but trails works a lot better when you use a texture that is tiled horizontally. As such, it helps reduce the "jiggering" of the curved movements. For example, instead of using the default "blurry dot" particle texture, the results will be a lot better if you use either a full white square (and apply the color through the particle system) or a vertical linear gradient (if you want smoothness in the trail lines).

[FaebuOG]

First Intro of a youtuber I skipped back because it was so satisfying

[alextronic]

I dont know why I didnt think of a particle system rather than using the trail renderer. This is so much better

[meznaneTB]

I've taken a bunch of your tutorials, for some reason this one really stands out as one of the best. I think it's the way you describe what you're applying and why you're applying it. 10/10. Most reusable effect I have made following your tuts as well... THANKS!

[Ofenkatze]

That woldspace tickbox in the trails module.... dude, you literally saved my sanity. Thanks so much!

[AbdulRahman-vtbw]

Best Channel for learn Unity Effects
i really love it!

[previll]

Damn this is exactly what I was looking for, your tutorials are really nice. There aren't a lot of videos like these on Youtube right now.

[endaevor]

Hey Gabriel, 'been asking you some advices for projectiles when i was still a student. I'm now working at Ubisoft ;) Good to see you going well with your channel.

[zombievirals]

Frustrating at first due to my lack of experience with the particle system, but once I got it, wow!! This is beautiful, I can't thank you enough!!

[AbsurdGameStudios]

Thank you! Even in 2023 this tutorial helps!

[Stinger-rqgy]

Thank you.
I made flame sword from this tutorial and light trails on another sword.

[meenuchan]

Thank you for teaching us such an awesome trail effect using particle system. This is very useful.

[petcarlson]

To add onto this if you speed up the simulation speed you can get even smoother lines. It does effect performance and other numbers like particle lifetime.

[davdev]

Thats pretty nice friend. I struggle a bit on particle system and vfx on unity and that helped alot. Thanks!

[EricDovergne]

Great Tutorial, I used this to make a water effect following the flow of a river ! Thank you
There are some changes in Unity 2021 but not difficult to adapt !

[FrostshadowStudios]

Really nice and somewhat complicated, yet easy to follow along. Thanks for the tutorial, my friend.

[FrostshadowStudios]

Nice, friend. Now I can create a cool slash effect with a simple trail paired with a slash effect from another tutorial.

[amuletgames]

This is amazing..I'm really considering to take your udemy course

[ricogt]

Thank you so much for making this tutorial