LIGHT_ATTENUATION randomly broken >_<

Hi,

Playing with this shader : http://wiki.unity3d.com/index.php?title=TransparentShadowReceiver

I'm facing a weir bug with Unity 5.3.3f1 : while tweaking the shader code and switching between the editor and monodevelop to see the result, suddenly the value returned by LIGHT_ATTENUATION(i) is always 0 and I can't get the right values to come back (light and shadow intensity), even if I put back the original shader code which was working at first ...

I've tried to switch to another shader in my material and then again the problematic one, delete my project Library folder, reinstall unity : nothing helps

Does someone have an idea to fix this problem please ?

 

And you're in forward rendering mode and trying to get shadows from a directional light?

 

Yes, and it was perfectly working at the beginning ... then not anymore >__<

 

Technically LIGHT_ATTENUATION is deprecated, isn't it? Try moving over to SHADOW_ATTENUATION?

 

I've started a fresh new project, and for now it's working again with both LIGHT_ATTENUATION or SHADOW_ATTENUATION.
I'll post a new message if I have this problem again and/or find its cause.

 

Is it? I can't get correct attenuation from point lights in forward add pass with SHADOW_ATTENUATION, but it works fine with LIGHT_ATTENUATION

 

LIGHT_ATTENUATION is a Unity 4.0 that does light distance falloff and shadows. SHADOW_ATTENUATION is just the shadow with no distance falloff. For Unity 5.0 the equivalent for LIGHT_ATTENUATION is UNITY_LIGHT_ATTENUATION. In both 4.0 and 5.0 the LIGHT_ATTENUATION macro just calls SHADOW_ATTENUATION for directional lights, but the differ some for other light types.

 

Thanks a lot for this explanation

 

I can confirm that UNITY_LIGHT_ATTENUATION works, thanks!