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Question by MaT227 · Jan 05, 2016 at 01:33 PM · shaderlightingshaderscgfragment

_LightMatrix0 and Directional Light

I am trying to access the _LightMatrix0 in a forward base pass to calculate some light point of view coordinate but it seems that the _LightMatrix0 is empty with directional light.

Any idea how can I solve this and how could I access to the _LightMatrix0 with directional light (without cookies) ?

I am trying to do this kind of thing.

 float4 position = mul(_LightMatrix0, worldPos);
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Answer by fguinier · Jan 05, 2016 at 02:02 PM

At first glance it should be there! did you try "unity_WorldToLight" instead?

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avatar image MaT227 · Jan 05, 2016 at 02:13 PM 0
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The variable _Light$$anonymous$$atrix0 can be accessed but it seems to be empty.

Concerning unity_WorldToLight I think that this value is deprecated on 5.0.3 as there is no reference of it in the built-in shaders.

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