how to render reference position pass in arnold c4d

[#1]

i have rendered pref pass from c4d which is not giving any output

[Stephen.Blair]

What pref pass?

The reference position is stored as Pref user data. So use a user data shader to get the Pref user data, and write that to an AOV

[1598757518thl]

I have tried adding Pref to the User data a few times,Or add user data shaders in Netwok editor but the resulting Pref channel is still missing.Are there any demonstration steps on how to use Pref

[peter_horvath]

First you have to add an Arnold tag to your object and enable Export reference points. That will create the Pref user parameter on the Arnold shape. Then you need to read the data from this parameter with a user_data_rgb shader and write to your custom AOV with an aov_write_vector shader.

[1598757518thl]

Very effective! I have already rendered it.

Thank you for your professional answer.