koobas.hobune.stream
Shadergraph Custom Function undeclared identifier
Hi all!
I am trying to get into the Custom Functions with the Shadergraph and got myself stuck. Whenever I try to make really simple customFunctions (via the string option) my out values throw the error undeclared identifer _CustomFunction_XYZ_outParam_2. When I try to declare it in the body I get the error redefinition of formal parameter 'outParam'. 
I really couldn't find any solution to this in the forum. Help would be really appreciated.
Solved the Undeclared Identifier issue... if you right click your custom node after you converted it to a sub graph. and select "view generated code" then search for your function name... say its called CustomBlurNode.... when you find it in there.... it will either be called CustomBlurNode_float or CustomBlurNode_half. Unity adds this on the end, it is the precision. Now go back into the Main Shader and you SubShader and check the precision settings... ( its in the top left corner of the screen, you can select Precision float or Half. ..and also in your Node ( click the gear icon ) it also has a precision set to Inherit, float or half. If you match all these up... the error disappears. ! for example, if unity names your function _float but your node is set to inherit. and the parent graph is set to Half. then it won't find the correctly named function. It might be possible to define 2 functions ? cut'n'paste job, one for each precision, but I didn't try that. Matching the precision worked for me.
Hi there, On which Unity and LWRP / HDRP version are you ? I'm on 2019.2.0f1 / LWRP 6.9.1 and it works with exactly the same thing you did. 
I use Unity 2019.3 and have the exact same issue.
same, unity 2019.3. cannot use a file as shader, cannot convert a custom 'string' node to a sub graph without getting. UndeclaredIdentifier errors, that don't make sense. Where are the docs ? (outdated / deprecated) where are the tutorials ? ...none. just need one simple working example... I can't find one anywhere, except the string-type Custom node, and I still can't convert those to a sub graph. sad :( any asset store stuff work better than this ?
maybe you need to use a PBR graph??? The bug stopped for me and im in unity 2020 with it in a sub graph
