🧵For all my Unity dev fellows out there, if you ever used "Graphics.DrawMeshInstancedIndirect" to do GPU instancing (left pic) and when you ROTATED your meshes they all got wrong lighting (right pic), I found out why is that 👇
#gamedev #indiedev #unity3d @unitygames
(1/4)
#gamedev #indiedev #unity3d @unitygames
(1/4)
From what I could gather from this forum post -> forum.unity.com/threads/trying…
Unity's example does a hack to inverse the matrix on the shader, but it doesnt work in the general case
(2/4)
Unity's example does a hack to inverse the matrix on the shader, but it doesnt work in the general case
(2/4)
so you need this matrix inverse function (left pic) and change the shader code to this (right pic)
(3/4)
(3/4)
this will give you the right results for lighting 🎉✨
Also Thanks to @CaballolD, @anthelme_dumont and Hammy#2816 on the Technically Speaking discord server (@HarryAlisavakis)
they pointed me in the right direction about the normals messing up the lighting
(4/4)
Also Thanks to @CaballolD, @anthelme_dumont and Hammy#2816 on the Technically Speaking discord server (@HarryAlisavakis)
they pointed me in the right direction about the normals messing up the lighting
(4/4)
• • •
Missing some Tweet in this thread? You can try to
force a refresh
