Standard shader: How to add lightmap from 3dsmax on UV2?

Unity Engine
1

I can’t figure out, how to add a lightmap coming from an external package (3dsmax) usually baked to UV-Channel 2.
Any ideas?

2

I am having the exact same problem. I had hoped I could plug it in the emission channel, but I can’t because i can’t specify the emission channel to use UV set 2.

Have you found a solution to this yet?

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3

No, let´s hope UT will fix this.

4

Modifying the Standard shader is not a way to fix it.

Lightmaps should go where they belong and that is the LightmapSettings.lightmaps array. A specific Renderer can then use a lightmap by using its index (Renderer.lightmapIndex) and then point at a specific area within it by using the scale & offset (Renderer.lightmapTilingOffset now renamed to Renderer.lightmapScaleOffset).

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5

Kuba could you supply more info please? For example I have 1 lightmap atlas uv baked on 3 seperate objects from another application. It’s a tga texture file. How do I apply that lightmap to uv slot 2 on the standard shader in unity? Sorry I can’t find this specific info anywhere.

6

Yes, please give us at least a short list of steps on how to add a lightmap coming from Max or whatever to a standard material.

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7

I think he means something like this. Add this script to the mesh you want to assign the lightmap to.

The process is…

  • Add your bespoke lightmap (or lightmaps) in to the lightmaps array
  • Hit ‘Set Lightmap Array’
  • Set the lightmap index and tiling/offset values you want for the mesh
  • Hit ‘Set Lightmap Values’

1941734–125556–SetLightmapsManually.cs (1.11 KB)

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8

Thanks, but doesn´t work for me.
No matter, however - UT guys have to implement a workflow for this.

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9

Oh weird. Did you set the Lightmap Index to 0?

10

Actually, you might need to turn off Continuous Baking in the lighting tab, and set lightmap mode to Non Directional too.

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