Hi everyone, I am trying out a workflow that turns a triangular surface into a quad one. When I use the dissolve node to remove an edge, it's logical that if I turn on “Remove Inline Points”, it will remove the extra points after the edge dissolved. But in practice it seems to just delete points where the point number are discontinuous with its neighboring points. As shown in the figure. I want to know if my understanding is right there ?

Inline points are identified with by a collinearity test with a tolerance. The "Collinearity Tolerance" parameter lets you specify much the angle can deviate from 180 degrees and still be treated as collinear. In your example, the angle formed from points 1, 7, 4 is close enough to 180 degrees (given the default collinearity tolerance) to be treated as collinear. The angle formed from points 4, 3, 0 deviates further from 180 degrees and is not treated as collinear. Decrease the "Collinearity Tolerance" parameter if you want to keep more of the points.