Possible reasons for half of print to have striations (see photos)

[Sticky]

• For my own education, what are some possible reasons the surface of my print would turn out half great, half with these striations? I did have the door closed and the top slightly ajar, so is it a heat issue? Thanks in advanced!

• Model: UFO Lamp or Christmas Ornament by Spicy_Squirts - MakerWorld
• Slicer settings used: Bambu Studio | Generic PLA Preset (Was testing this out because my custom calibrated setting needs fine-tuning)
• Type of filament used: Overture Turbo PLA

[EnoTheThracian]

Can you indicate the Aux fan on the images?
That may already help with resolving your issues.

[Sticky]

Hi. Just to follow up on this thread. With more research I believe the issue maty have been related to IRONING on Curved surfaces - which is recommended to NOT do. I also believe there was some heat creep from the door closed. Cheers everyone