V-Ray Tip: VRayEdgesTex: Crisp Contour Lines for Technical Renders

VRayEdgesTex is a fast, controllable way to overlay crisp contour lines on shaded renders—perfect for technical illustrations, product sheets, and clean lookdev previews. If you need licensing, upgrades, or expert purchasing advice, visit NOVEDGE or browse V-Ray options at NOVEDGE: V-Ray.

• Quick setup as a pass
  • Create a VRayEdgesTex map.
  • Add a VRayExtraTex render element and assign the VRayEdgesTex to it.
  • Set Edge color (typically black) and Background color (white or mid-gray for compositing flexibility).
  • Choose Width units:
    • Pixels: consistent line thickness across the frame (best for animation; minimizes flicker).
    • World units: line thickness tied to scene scale (best for stills with accurate scale cues).
  • Composite the pass in Multiply (black lines on white) or Screen after inverting.
• Material overlay for “all-in-one” looks
  • Use a VRayBlendMtl: base = your shaded material, coat = VRayLightMtl (pure color for lines).
  • Drive the coat amount or the LightMtl’s opacity with VRayEdgesTex.
  • Enable “Compensate camera exposure” on VRayLightMtl for consistent line intensity.
• Pure line art
  • Assign VRayLightMtl to objects and plug VRayEdgesTex into its color.
  • Render on white or flat background to produce clean vector-like plates.
• Key controls for stable, crisp lines
  • Edge visibility: turn off “Show hidden edges” for clean visible contours; enable it for blueprint/wireframe looks.
  • Intersection control: use the “consider same object only” mode to avoid contact lines between separate meshes when not desired.
  • Anti-aliasing: keep texture filtering minimal on the Edges map; let V-Ray’s image sampler handle edge smoothness.
  • Resolution changes: if you plan multiple output sizes, prefer pixel-width to preserve a consistent look.
• Compositing best practices
  • Do not denoise the Edges pass—denoisers can blur or fatten linework.
  • Use the VFB’s Layer Compositor or external comp to fine-tune line density via Levels/Curves.
  • Export as a separate EXR layer (VRayExtraTex) to keep control over blending and color.
• Combine with V-Ray Toon
  • VRayToon excels at silhouettes and curvature-based outlines with adjustable width.
  • Use VRayEdgesTex for internal/mesh topology lines; mix both for rich technical styles.
• Troubleshooting
  • Seeing triangulation lines? Refine smoothing groups/hard edges in your DCC and avoid showing hidden edges.
  • Lines too light after exposure tweaks? Drive them through VRayLightMtl with exposure compensation enabled.
  • Flicker in animation? Use pixel-based width and keep camera sampling stable (fixed noise threshold across shots).

For purchasing, upgrades, and expert advice on V-Ray and companion tools, talk to NOVEDGE—their team can help tailor the right setup for your technical illustration pipeline.

You can find all the V-Ray products on the NOVEDGE web site at this page.