Error creating 4096 Textures

gskinner · December 23, 2015, 5:27pm

No matter what I do, I can’t seem to get unity to create a 4096 Texture Atlas.

I’ve set Max Size to 4096 or 8192, but always get the same error when trying to pack:
ArgumentException: Atlas “foo” (2048x2048) can’t fit sprite “texture2” (3840x1080).
UnityEditor.Sprites.DefaultPackerPolicy.OnGroupAtlases (BuildTarget target, UnityEditor.Sprites.PackerJob job, System.Int32[ ] textureImporterInstanceIDs) (at C:/buildslave/unity/build/Editor/Mono/Sprites/DefaultSpritePackerPolicy.cs:104)
UnityEditor.Sprites.Packer.ExecuteSelectedPolicy (BuildTarget target, System.Int32[ ] textureImporterInstanceIDs) (at C:/buildslave/unity/build/Editor/Mono/Sprites/SpritePacker.cs:117)
UnityEditor.DockArea:OnGUI()

Any ideas what’s going on?

My sample project has just 2 textures included, each one is 3840x1080, both with a Max Size of 4096, and packing tag of “foo”.

2436321–167013–Test4096Atlas.zip (28.4 KB)

Kurius · December 23, 2015, 8:13pm

Just a comment… if you’re building for mobile devices, you do not want such a huge atlas. It will be a performance hit on mobile.

jamius19 · December 24, 2015, 3:21pm

check if the Sprite Packer is doing something funny!
Try after disabling it from Edit > Project Settings > Editor > Sprite Packer…

and as @Kurius said, which android on earth are you targeting!!!
I get a huge impact on performance even if I use several 4k textures on One Plus One

gskinner · January 4, 2016, 6:07pm

We’re targeting PC/Console actually.

The solution, provided by Laurynas from Unity QA(thx!), is to create a custom SpritePacker policy, like so:

gist.github.com

https://gist.github.com/treefortress/2493b0ea3e62a86696d1

LargeTexturePackerPolicy.cs

using UnityEngine;
using System;
using System.Linq;
using UnityEditor;
using System.Collections.Generic;


public class LargeTexturePackerPolicy : UnityEditor.Sprites.IPackerPolicy
{
    protected class Entry

This file has been truncated. show original

According to the docs here: Unity - Manual: Sprite Packer

Just add this class to your project, open Window > Sprite Packer and choose this policy. 4k Textures should now be generated.

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Error creating 4096 Textures

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