---
title: Profiles
order: 1
---

Five fillet shapes, identical across rounding and blending. Pick the one that matches the look you want.

| Profile | Curve | Best for |
|---|---|---|
| **Round** | Classic circular fillet | Default. Soft, even rounding. |
| **Sharp** | Pulls in toward the corner | Hard-surface knees, mech panels |
| **Soft** | Gentle, smoothly continuous | Organic forms, ergonomic surfaces |
| **Tight** | Squared, deep but tight | Industrial fillets, near-square edges |
| **Chamfer** | Flat 45° bevel | Beveled hardware, machined edges |

### Round

![Round profile](../assets/profile-round.webp)

### Sharp

![Sharp profile](../assets/profile-sharp.webp)

### Soft

![Soft profile](../assets/prfile-soft.webp)

### Tight

![Tight profile](../assets/profile-tight.webp)

### Chamfer

![Chamfer profile](../assets/chamfer.webp)

## Profile keys in the modal

While the *Adjust Rounding* modal is active (`B` for primitives, `Ctrl+B` for boolean blends), the number keys snap between profiles instantly:

| Key | Profile |
|---|---|
| `1` | Round |
| `2` | Sharp |
| `3` | Soft |
| `4` | Tight |
| `5` | Chamfer |

While the modal is open, `S` toggles between adjusting the radius and the *Chamfer Smooth* parameter (only meaningful when the profile is Chamfer).

## Chamfer Smooth

The Chamfer profile produces a flat 45° bevel — sharp where it meets the adjacent faces. *Chamfer Smooth* softens those two seam edges so the chamfer blends in instead of stopping abruptly.

![Chamfer Smooth](../assets/chamfer-smooth.webp)

- Range: `0.0–5.0` (soft max `0.5` for primitives, `1.0` for blends)
- Only visible when the profile is set to Chamfer

You'll find a Chamfer Smooth control alongside every Chamfer-enabled profile setting — primitive, boolean blend, emboss inner corner, prism bevel.

## Material Blend

Boolean modifiers also have a **Material Blend** width multiplier — independent of the geometry's blend. It controls how the *color seam* spreads across the boolean:

- `1.0` — color follows the geometry exactly (default)
- `> 1.0` — color bleeds wider than the fillet
- `0.0` — color snaps even when the geometry is smoothly blended

Useful when you want a smooth physical join between two materials but a sharp visual line between their colors, or vice versa.

## See also

- [Rounding](rounding.md) — applying profiles to primitive edges
- [Blending](blending.md) — applying profiles to modifier seams
- [Rounding](rounding.md#adjust-modal-b) and [Blending](blending.md#adjust-modal-ctrl-b) — modal hotkeys for live fillet tuning