

First off, welcome Francisca.
(I've deleted your other thread where your attached pics weren't previewing)
Yeah, something is definitely not right there! But afraid the only real option when Revit gets this confused is make the view anew (never fun with a perspective view you might have employed before)
Before you do (delete this one) do any other views do it? have you tried cycling your view settings to "jog" it behaving properly?
Last edited by snowyweston; February 23rd, 2021 at 10:34 AM.
I have tried and tried, but the result doesn’t change
What have you tried?
Specifics will help us diagnose. Screenshots (of settings) more the better.
Mind, if you've always got to ask whether all this time (wasted) is worth it? Or does a new view (or others) corrupt equally? Because that might suggest other, higher, issues (graphics driver etc)
For example, do shadows in axo views look okay?
Yes, shadows in axo views are ok. Perspective views are altered. I have never succeeded in generating correct perspective shadows
okay I think I've got it - the settings in first screenshot all look (my italian's rusty) - but the view preview in the samr image appears to show what looks like cad...?
Weird as it sounds, hatch fills in 2D cad can cast shadows - and along with their general impact on performance (generally no-thanks to their over-large model space extents) the result effect can be, as you've observerd, quite horrible.
One, remove (hide, turn off or better unload) from view/model... then
two, go the extra and shrink your model space extent with a section box and/or reduce your draw distance.
If it's not CAD (?) then even more a mystery.
I’ve removed 2Dcad and shrunk my model space extent with a section box, but the result is the same
@Francisca, сan you copy one or two corner facade walls with windows into an empty project and post it here? Let's check if the same will happen on other computers.
I’ve already tried on other computers and nothing happens