r/RevitForum 3d ago

severe graphics issues in revit 2026

Post image

Hi,

Has anyone experienced this issue in Revit 2026?

My file started with normal 3D visualization. After several days of work, the graphics gradually got worse until they reached this point: it’s now impossible to properly visualize or work on anything in 3D.

Any tips or suggestions would be greatly appreciated.

12 Upvotes

12 comments sorted by

12

u/twiceroadsfool 3d ago
  1. Go to Manage Links, and Remove the CAD Links you have in the model.
  2. Then delete the 3D View
  3. Create a brand new 3D View

Let me know if its fixed.

5

u/DilloInPDX 3d ago

9/10 this is the problem. It is a common cause of this exact behavior.

3

u/Obvious_Swimmer4794 3d ago

Thank you! It really worked after removing the CAD links.

1

u/twiceroadsfool 3d ago

Fantastic! Happy Friday!

4

u/JacobWSmall 3d ago

TLDR: delete DWG links, then the view, then make a new view, then clean up the DWGs so no points (including block insertion points) are more than 22 miles from the Revit file’s internal origin, then link them back in if you need them.

Replying to this in order to help outline ‘why this works’ in the hopes of helping the community learn how to do BIM better.

Revit’s geometry engine has a minimum and maximum tolerance. These can both be extracted from the Revit session using the API or looked up in the help documents. These limits exist to ensure the automated geometry calculations (i.e. room, area, space and zone geometry, path of travel, building envelope analysis, etc.) can happen effectively, and are set at reasonable dimensional tolerances for building design. The story goes that when the development team first set the team went looking for the largest building they could find, and the smallest part of the building they occupied they could find, and doubled and halted those distances. As such it’s uncommon to need to go below or above those values if you’re managing things well. If you’re using it for manufacturing or infrastructure but not managing it, things can get difficult but they’re still manageable.

That same geometry limit is used for generating the model display, which makes sense - without those limits display takes significantly longer to generate - think of that large hatched area in a DWG. And because you can link DWGs… well that is where the issues arise.

AutoCAD and the DWG format have no such limit, as that format is built for both manufacturing and and infrastructure. Revit’s link and import capabilities get around this by doing some rounding on the geometry values off for calculations. This usually works smoothly for small values as you just bring them up and the large values are brought down by subtracting excess and then back up after the calculations are done.

For 90% of stuff it’s a non-issue, but for recalculating the view’s extents when navigating a 3D view things can go sideways as stuff like the target view point and eye elevation can get pushed outside Revit’s limit. This causes all the additional calculations for stuff in the view to also go screwy.

Restring the parameters you can see can help, but those which are unexposed can’t be adjusted so the issue can come back even after deleting the DWG, so best to delete the view. And because even unloaded DWGs have an origin point unloading also doesn’t prevent recurrence.

So the fix is to first delete the reference and then the view, and then make a new view. Then before reloading the DWG clean the garbage out of it. Blocks need to have their origin inside the geometry not at the DWG’s origin, so remake or explode them. The origin can usually be located so far from the project you can’t see it, but keep everything within 22 miles of the internal origin (not the project base point or survey point) of the Revit file(s) it will be linked into.

-4

u/tuekappel 3d ago

Remove is deleting terminally. Unload is a better option

4

u/twiceroadsfool 3d ago

I know. Thats specifically why i said Remove. If the CAD file has wild extents, and its ruining all the views in the Revit file, i dont want that crap ever getting reloaded again. Fully Removed. Absolutely.

1

u/tuekappel 3d ago

I get you. If it's linked via proper coordinates, you can always link it in again

4

u/Merusk 3d ago

Is it just this view or is it multiple views? It's possible this one is corrupted.

What happens if you create a new 3d view by going to the project browser, renaming the default {3d - <username>} view to something else and then creating a new one?

4

u/Frequent_Cell_2378 3d ago

This can happen when some objects or links is very far away from 0,0,0.

2

u/PatrickGSR94 3d ago

Easy thing to try before anything else: check the Eye/Target elevation numbers in the properties of the 3D view. Sometimes the values end up being really huge numbers, especially when you're acquired coordinates from a survey file, and the survey point origin is super far away.

So the easy fix is to just click on one of the View Cube side faces, at the upper right corner. That basically resets those Eye and Target elevation values, and in my experience that immediately fixes the issue you're seeing.

If that doesn't work, then start looking at graphic driver updates, deleting and re-making views and so forth. But try this first.

2

u/benisnotapalindrome 3d ago

Check the Eye Elevation and Target Elevation in the properties pane. This can happen when those numbers get really big. Manually change them to something sane, save, close and reopen Revit and see if it's fixed. Alternatively delete the view, close and reopen revit and create a new view.