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Votes
0
Found in
5.0.0a18
Issue ID
623387
Regression
Yes
5.0 surface shaders use 13-14 more ALU instructions and are 20-50% slower
Import the attached Blend SM2.shader in Unity 4.x. It will work fine. Import it in Unity 5.0 and you will get the following compilation error:
"Arithmetic instruction limit of 64 exceeded; 65 arithmetic instructions needed to compile program"
There is a workaround to make the errors go away, by adding "#pragma target 3.0" to the appropriate place in the shader file, but that has its own drawbacks.
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