Wire frame pieces next to solid pieces in Stud.io

[The Southern Brickfan]

Hi

I am deconstructing a crane chassis I made, and am using Stud.io to record its structure (as well as Photos). I have somehow got three pieces that show up as wire frames, rather than solid pieces, unless I happen to click on them, or connect another piece to them. Once connected they revert back to wire frames.

I have deleted them several times, and put them back in again, but to no avail.

Any ideas?

Thanks

Brian

[SylvainLS]

They are colliding. This transparent effect indicates the parts are overlapping somewhere.

It could be a bug in their shapes or a wrong position.