Texture Atlasing

Question

I want to combine a bunch of textures into one material, then use that material for multiple gameobjects so they will batch. However, if I use material offsets to do t$$anonymous$$s, it creates a copy of the material for each object, thus no batc$$anonymous$$ng. I noticed that imported meshes use a skinned mesh renderer, w$$anonymous$$ch looks like it uses Bounds to ac$$anonymous$$eve the effect I'm looking for. However, I t$$anonymous$$nk you can only use that with imported objects.

In other words, instead of having eyes, a nose, and a mouth all on one texture, I want 5 different 2d buildings.

Edit: I thought that SetTextureOffset changed the UVs. Apparently I need to use the method suggested by The comments below. Thanks guys!

Answer 1

Best Answer

Answer by Marnix · Jun 24, 2011 at 04:22 PM

You should use the `sharedMaterial` property in the renderer. You could even already define it in the material prefab in your project before adding it to an object. In runtime, it will only change one object, but sharedMaterial changes it for everyone.

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Change the uv-coordinates of your vertices instead. It is just a quad, so you can change the vertex data!

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christo1745 · Jun 24, 2011 at 04:24 PM 0

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Marnix · Jun 24, 2011 at 04:25 PM 0

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christo1745 · Jun 24, 2011 at 04:35 PM 0

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Marnix · Jun 24, 2011 at 04:37 PM 0

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Marnix · Jun 24, 2011 at 04:48 PM 1

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Answer 2

Answer by Steven-Walker · Jun 24, 2011 at 04:56 PM

You need to offset the UV coordinates of your meshes so they correspond to the atlas coordinates. So there's 1 atlas containing multiple textures and 1 material applied to multiple objects. What makes t$$anonymous$$s work are the UV coordinates of the mesh. Your material in Unity should have default offsets (1,0 1,0).

You can build an atlas in Unity and create the UV mesh coordinates using an editor script (or tool like Sprite Manager). Or you can manually build an atlas in Photoshop and assign the mapping/UVs in an external 3D program.

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Answer 3

Answer by raminsh · Jun 24, 2011 at 05:05 PM

ok I have actually done t$$anonymous$$s but not in unity, I usually use one of the following:

1- NVIDIA Texture atlas (you can get it from: http://developer.nvidia.com/legacy-texture-tools and it has pretty much all you need)

2- Flatiron from: http://www.texturebaking.com/ t$$anonymous$$s one is a 3dmax plugin and really useful

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christo1745 · Jun 24, 2011 at 05:09 PM 0

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Texture Atlasing

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