It works like a charm! Thanks a lot!

Thank you @ferdinand for the detailed answer and code. I will do more reading in the sdk document.

Hi, @m_adam Thank you for your kindness and the inspiring answer! It's a GREAT Christmas present for me! So sorry asking XPresso related questions in this forum. The problem I faced is a little bit complex than this: I need sample Effectors' total Output Strengths in the position from a Polygon Object's Points, and store the result into a Vertex Color Map attached for further use. This problem bothers me for months, and I didn't find any clue until your post. I have never think about using Python Node with global variable in XPresso Network can keep the data as I need and do the magic! From the bottom of my heart, I want to say THANK YOU. The answer you give not only solve this problem, but also inspire me re-thinking of ObjectList Node and Python Node, and how these nodes executed in an XPresso Network. Just let me THANK YOU AGAIN! Best wishes for you to have a wonderful holiday!

@s_bach, thank you, I'll start to do some hard reading!

@c4ds, don’t worry! Every steps (even the off-road one) make some progress, right? I appreciate the way you focusing on the problem solving, which I believe is also the wonderful thing of this forum: we do our best to solving the problem itself, discussing about the better/more accurate answers rather than “who is right, who is wrong”. Last but not least, thank you for taking time to reply!

Hi, @y_puech I may find a bug of the forum about "mark a post correct answer", discussion post here: Cannot mark post as answer Once this bug solved, I will re-edit this topic and posts correctly.