How to Make Slash VFX | Roblox Studio

Summary (Slash VFX in Roblox Studio)

The video teaches how to create a wind-themed “Breathing” slash VFX in Roblox Studio. It combines layered ParticleEmitters (textured slash “wisps/specs”), Beam objects (curved glowing arcs), and Meshes/ground wind meshes, then syncs everything to an animation using Lua tweening.

Artistic techniques / creative process shown

Layered VFX construction

• Build a “main slash” look by stacking multiple slash textures (particles) with different:
  • sizes
  • colors (dark green → brighter yellow-lime accents)
  • transparency fade behavior (using transparency keypoints)
  • Z-offset layering to prevent z-fighting
• Use texture-driven style by selecting pre-made slash textures that are sharp/broken to match the theme.
• Use several textures (even “spam” acceptable) to make slashes look good without relying on only a few emitters.

Beam-based arc detailing

• Create a curved arc using Beams with a slash texture as the beam material.
• Duplicate beams to make them broken/jagged and more visually complex.
• Hide problematic beam ends by using:
  • transparency
  • width trimming
• Optionally use tools/plugins (e.g., VFX Forge) to multiply width values instead of manually editing.

Motion / timing via parameter tuning

• Adjust:
  • rotation direction/speed
  • lifetime
  • pulse behavior
  • transparency fade
• Tune settings so the slash reads correctly even at very short lifetimes.
• Randomize certain values (like size and rotation) for more natural variation.

Ground impact / wind environment

• Add ground wind particles and shockwave-like flat elements under the slash.
• Add additional atmospheric wind meshes using an attribute-driven mesh script.

Debris / after-effect sparks

• Spawn tiny rock/grass/leaf particles trailing outward, controlling:
  • lifetime
  • drag/speed
  • emission angle
• Use reference creators’ work to match pacing and behavior.

Highlight + flash impacts

• Add a Highlight effect tweened with easing to sell the impact.
• Add quick impact particles synchronized to the flash.

Animation syncing

• Find a key moment in the sword animation and trigger/sync effects accordingly.
• Use Lua scripts to:
  • loop emit particle objects at the right counts
  • tween beam widths from “start bigger” down to 0 for fade-out
  • rotate the beam attachment into the correct orientation

Step-like workflow (as shown)

Main slash setup (particles)

• Attach particles to a part/attachment.
• Set short lifetime (e.g., ~0.2–0.3) and very low speed so it doesn’t fly away (otherwise it may disappear).
• For each slash layer:
  • set texture (sharp/broken theme)
  • set base color (dark green) and add brighter lime/yellowish variations
  • tune rotation speed/direction to face the correct way
  • layer using Z offset and different textures
  • adjust transparency keypoints, including transparency delay so it doesn’t vanish immediately

Beam arcs

• Create attachments for beam endpoints.
• Add a curved Beam and tune:
  • curve size (diameter-related scaling to become circular/semicircular)
  • segment count
  • rotation to aim along the slash direction
• Duplicate beams and vary:
  • textures
  • width/curve/scale
  • transparency (to cut off unwanted ends)

Organize beams

• Group beams under a “slash group” attachment hierarchy so you can rotate/tween them more easily.

Add spec particles

• Duplicate/add small particle emitters along the slash to create spark/spec behavior.
• Set a wider lifetime range if the slash is looping/flashing.
• Use transparency fade out and optionally quick fade in.

Tween scripting

• Add attributes like emit count, plus beam sizing attributes (width0, width1).
• Use Lua to:
  • traverse descendants
  • emit particle systems using stored emit counts
  • tween beam widths to shrink/fade out
  • tween/rotate the beam attachment into the correct CFrame

Ground + wind + secondary effects

• Add ground wind particles (transparent; light emission toggled as preferred).
• Add shockwave-ish flat particle/texture.
• Add smoke/atmospheric elements.
• Use a reusable mesh script for ground wind meshes via attributes (size, neon/transparency, duration).

Highlight + sparks/impacts

• Add a tweened Highlight with circular easing.
• Add very short-lived impact particles, optionally with a second reversed-sized impact.

Debris

• Spawn rocks/leaves/grass particles with tuned drag, speed, lifetime, and emission angle.
• Use reference gameplay/VFX creators to match timing and quantity.

Sword charging variant

• Add/enable a sword-specific wind effect.
• Hide/fade it via a secondary script/tween trigger.

Contributors / creators mentioned

• Sonido Visuals (plugin for slash textures / VFX)
• VFX Suite (mentioned as an alternative plugin)
• VFX Forge (mentioned for beam width editing)
• VFX Forge users/tools (workflow reference)
• Roan (referenced for excellent slash work)
• Hinokami Chronicles (game reference for visual style/patterns)
• Deus / Demon Slayer (style inspiration for green/yellow accents)
• Moon Animator (tool mentioned for animation keyframes)