Light.shadowMatrixOverride

Unity Engine
1

Hi

I’m writing my “custom” culling system, and trying to control the culling matrix on my spot light source.
Ive tried any possible combinations of matrix multiplication, and haven’t yet managed to get it even to the same matrix it uses by default (which is unknown). Documentation is lacking info on what the matrix is supposed to have. Is it in local space, is it in world, we don’t know.
The only thing i ve managed to find out is that zeroing it disables culling. Which partially what I wanted, but now it tries to render any objects off-screen.

I hope someone could bring in some insight

1 Like
2

well, if anyone needs it

            var projM = Matrix4x4.Perspective(fovDeg, 1.0f, nearPlane, farPlane);
            var scale = Matrix4x4.Scale(new Vector3(1f, 1f, -1f));
            m_light.useShadowMatrixOverride = true;
            m_light.shadowMatrixOverride = math.mul(projM, scale);
5 Likes
3

Thanks for posting back your solution =D