I am trying to UV-map a car (Bullet). I keep running into a problem that makes a UV-mapped set of polygons from a mesh disappear from UV-mapping window once I UV-map another set of polygons from the same mesh - in this case, 'bodyshell.'
In Bullet, 'bodyshell' is composed of all four quarter panels, a roof, a front bumper and a hood. So, I start from selecting a front bumper area:
Now, I 'detach' with these options:
to new object OFF
keep original OFF
enable drag OFF
Believing the programme that it indeed detached the polygons (single click on the selected polygons), I apply the UV-map:
Now, I would like to UV-map sides. So, I select all the left-side polygons and detach them:
As soon as I assign a UV-map to the left side, the bumper disappears from UV-mapping window, even though I detached both the front bumper area AND left side from 'bodyshell':
There is also a similar problem that some
of the earlier mapped polygons disappear from the view once I get to UV-map a new group of bodyshell polygons - here, some of the left side polygons vanished after UV-mapping a hood:
I haven't managed to make a working UV-map using the detachment method with all the 3 ticks off. How do I prevent these problems from happening?