How to import a sprite sheet into Unity.

What you need before you start

This tutorial assumes a Unity 2D project and a 4×4 walk-cycle sprite sheet — 16 frames in four rows: down, left, right, up, four frames each. That is exactly the layout PixelForge produces (at both 96px and 48px per frame), but any evenly-gridded sheet works the same way. The whole job is four moves: import without blurring, slice the grid, make four clips, play them from input.

Import the sheet with crisp pixels

Drag sprite-sheet-96-transparent.png into your Assets folder, select it, and fix the Inspector before anything else — Unity's defaults (bilinear filtering + compression) will smear pixel art into mush:

Click Apply. If your game window still looks soft later, check the camera: pixel-perfect rendering wants an orthographic camera, and the 2D Pixel Perfect package can lock it in project-wide.

Slice the 4×4 grid in the Sprite Editor

Unity names the pieces sheet_0 through sheet_15, left-to-right, top-to-bottom. On a PixelForge sheet that means:

Turn each row into an animation clip

Unity has a drag shortcut that does three setup steps at once: expand the sheet asset (the little triangle), select frames 0–3, and drag them into the Hierarchy. Unity asks where to save the clip — call it walk_down.anim — and creates a GameObject with a SpriteRenderer, an Animator, and a controller already wired to play it.

For the other three directions, keep that same GameObject selected and open Window → Animation → Animation. In the clip dropdown pick Create New Clip… (walk_left, walk_right, walk_up), then select the matching four frames in the Project window and drag them into the timeline. Set Samples to 8–10 for a natural walk pace — if you don't see the Samples field, enable Show Sample Rate from the timeline's gear menu.

Drive the walk from player input

The simplest top-down setup that actually feels right:

• Add a Rigidbody2D — set Gravity Scale to 0 and freeze Z rotation.
• Add a Collider2D (capsule reads best for characters).
• In a small script, read Input.GetAxisRaw for both axes each frame, move with rb.linearVelocity = direction * speed (or rb.velocity before Unity 6), and pick the clip by the dominant axis: anim.Play("walk_right") when x wins and is positive, walk_left when negative, walk_up / walk_down when y wins.
• When input is zero, either anim.speed = 0 to hold the pose or add an idle state — the neutral first frame of each row works as a built-in idle.

No sprite flipping tricks needed: the sheet has a dedicated left row, so glasses, hair parts, and asymmetric outfits stay on the correct side — one of the quiet advantages of a 4-row sheet over the flip-the-right-row shortcut.

No sheet yet? Forge one.

Everything above works with any 4×4 sheet — and if what you're missing is the character itself, that's the part PixelForge does: upload one photo and get this exact layout back, feet aligned, background removed, at both 96px and 48px. See Unity character sprites from a photo for how the pack is engineered for the Sprite Editor, or start from the main photo-to-sprite page.