Changing Emissive texture in C#

Questions & Answers
1

I’ve been trying to change an Emissive texture through C# and have gotten no results. I don’t know how to achieve this. I’ve tried

renderer.material.SetTexture("_EMISSION",myTexture)

with no success. Changing emissive colors has been no problem for me, but I can’t seem to find anything anywhere on how to change the map itself. Any ideas?

2

You have to have the correct property name. In this instance, it would be:

     renderer.material.SetTexture ("_EmissionMap", myTexture);

However, keep in mind that you will probably have to also set the emission colour and power values yourself, as these are ‘black’ by default.

3

For anyone coming across this answer. The above did not work for me in 2021.3 HDRP. I had to use:

_gameObject.GetComponent<Renderer>().material.SetTexture("_EmissiveColorMap", _texture);

Also, it doesn’t seem that, at least in my unity version, that you’ll need to set color/intensity values anymore. At least not when changing the map. The values may default to black on a new allocation of the map, but when I changed mine, it simply retained the existing values.