Can you run the source without the 3d object to check it out to see if its that?
I'll find some time to re-write the library for pb6 next week.
Yeh, already done that, I nulled the bobs code, and created a sprite canvas to blit/draw the scroller to. My updated code has DPI awareness enabled, and has the screen resolution calculations for the window (to enforce the true 640x480) rather than have it scale.
This site really doesn't like long posts or code attachments (bbcode). -shrugs-
If you want my adjusted code, I'll upload it for you (google drive again?)... its on the google drive.

EDIT... My updated code is on google drive, and I just grabbed the updated exe from google drive, and it works as intended now

everything works nicely (and its scaled to 125%, aka 800x600 on my system, not enforced to 640x480).