On iOS 8, this code (Swift) worked:let shaderString = void main() + { + gl_FragColor = SKDefaultShading().bgra; + } let shader = SKShader(source: shaderString)Now on iOS 9, with Metal under the covers, I get this error message:2015-06-09 18:36:39.497 TestVideoCam[550:63920] Jet: Error Domain=MTLLibraryErrorDomain Code=3 Compilation failed: program_source:6:321: error: use of undeclared identifier 'SKDefaultShading' fragment float4 SKShader_FragFunc( texture2d<float> u_texture [[texture(0)]], const device float *u_time [[buffer(0)]], const device float2 *u_sprite_size [[buffer(1)]], const device float *u_path_length [[buffer(2)]], SKShader_VertexOut interpolated [[stage_in]]){return SKDefaultShading().bgra;} ^ UserInfo=0x156e50c10 {NSLocalizedDescription=Compilation failed: program_source:6:321: error: use of undeclared identifier 'SKDefaultShading' fragment float4 SKShader_FragFunc( texture2d<float> u_texture [[texture(0)]], const device float *u_time [[buffer(0)]], const device
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