Scripting Unity post-processing stack

c# unity3d post-processing
agiro picture agiro · Jul 19, 2017 · Viewed 9.2k times · Source

I'm trying to imitate a lightning effect in Unity using its post-processing stack's bloom effect via script (to modify the intensity), but somehow I'm unable to actually set anything via script. 

PostProcessingProfile postProcProf;
postProcProf.bloom.settings.bloom.intensity = 
Mathf.Lerp(data[i].Strength, data[i + 1].Strength, data[i].TimeToReachNext);

This is my code, but it says

Cannot modify the return value of BloomModel.Settings, because it is not a variable.

I have found no guide on how to script post-processing stack, only on how to use it from the editor.

Answer

Serlite picture Serlite · Jul 19, 2017

As per Unity's guide on modifying post-processing at runtime, you should be modifying a copy of the settings value, then overwriting the original with your copy (don't try to change members of BloomModel.Settings directly):

PostProcessingProfile postProcProf;
var bloom = postProcProf.bloom.settings;
bloom.bloom.intensity = Mathf.Lerp(data[i].Strength, data[i + 1].Strength, data[i].TimeToReachNext);
postProcProf.bloom.settings = bloom;

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