Light problem in transition from 20b to 21b Unity 5

KEric · Feb 17, 2015

Can anyone tell me what happened with lighting computation starting from Unity 5 21b?
It looks like lighting values (ambient/directional) are more intense. I'm attaching two screenshots made in Unity editor using version 20b and 1f (the problem exists from 21b though).
As for shaders I'm using custom ones that I've written myself. Within them I'm using such values as:

-- Vertex Shader:

Shade4PointLights(unity_4LightPosX0, unity_4LightPosY0, unity_4LightPosZ0,
unity_LightColor0, unity_LightColor1, unity_LightColor2, unity_LightColor3,
unity_4LightAtten0, worldPos, worldN);

...

_LightColor0.rgb

-- Fragment Shader:

UNITY_LIGHTMODEL_AMBIENT

AcidArrow · Feb 17, 2015

Are you sure it is beta 21 and not 22?

Release notes from beta 22:

Shaders no longer apply a 2x multiply of light intensity. Instead lights are automatically upgraded to be twice as bright. This creates more consistency and simplicity in light rigs. For example a directional light shining on a white diffuse surface will get the exact color of the light.

You might have to adjust your shaders to remove a 2x multiply. This is only the case if you define your own lighting function, in the case of surface shaders this is usually not the case. So most content will not require the change. In most cases the shader code looks like this:

c.rgb = s.Albedo * _LightColor0.rgb * (diff * atten * 2); --> c.rgb = s.Albedo * _LightColor0.rgb * (diff * atten);

Click to expand...

KEric · Feb 17, 2015

I think that's it. Many thanks for the information!

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Light problem in transition from 20b to 21b Unity 5

KEric

Attached Files:

b20.png

f1.png

AcidArrow

KEric

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Light problem in transition from 20b to 21b Unity 5

KEric

Attached Files:

b20.png

f1.png

AcidArrow

KEric