After Al's response to Irender movie not affecting a model's section settings, I retried creating a rapid movie in SU8, then, I created the same movie with the Irender movie maker.
The two movies were not the same. The Irender movie did not have sections in it, moreover, when the Irender movie was done. The model no longer had the section planes in it. Had I saved the model at the end, I would have lost my sections. I will email you the two movies.
Thanks Al, until yesterday I naively didn't realize that I had to set the section plane area of the setup tab.
After setting it to All this morning, I the section rendered properly. I haven't yet tried an animation with that setting.
I will try the same model which had the section planes removed in my previous animation and see if the section planes remain in the model.
I'll get back to you with the results.
Thanks again.
RL