The information in this article applies to:
When I take a 3D camera view of my plan, the materials don't look right. They appear to flicker on screen when I rotate, and look as though they are showing the materials that should be behind them.
Why is this happening, and how do I fix it so my plan displays correctly?
There are several different potential reasons why you may exhibit this behavior, known as z-fighting. The most common reasons are:
To resolve the issue, we first need to determine the cause. If all of the objects in your plan appear to be exhibiting the behavior, the issue is likely related to one of the first two; either the plan is located too far from the origin, or you have an exceedingly large terrain.
The most common reason for this would be if you have imported a DWG or DXF file from a third party source in to the program that was located very far from the origin, and then proceeded to draw in this area rather than moving it back to the origin.
In the future, if you import a DWG or DXF file from an outside source, you'll want to make sure to set it back to the origin before beginning to draw in the structure, as per the instructions in the "Locating an Imported 2D DXF or DWG File" resource in the Related Articles section below.
If you have a very large terrain, and are experiencing z-fighting only when taking a Perspective Full Overview , then you may need to use a standard Full Camera view outside of the structure and adjust it to create the type of view you want.
You can also increase the Clip Surfaces Within setting in your Perspective Full Overview Specification dialog. The default will be 24", but you can increase this to a larger value, such as 300". You may need to test different values in this plan in order to create the results you want in the overview without experiencing z-fighting.
If the z-fighting behavior only appears to be in one area of a plan, it is likely that an object is occupying the same space as another object. A common example for this would be if a slab is absolutely even with the terrain, you will notice the flickering of the concrete material of the slab with that of the grass terrain below.
If this is the case, raising the height of the slab, even by so much as 1/16" will typically resolve the issue.
Finally, it is also important to ensure that your video card meets or exceeds the minimum system requirements, and that you are using the most up to date driver which is compatible with your operating system.
If none of the suggestions above resolved the issue, we would recommend you verify these.
System Requirements, including those for the video card, can be located on the website at:
If you are unfamiliar with the process to update your video card's driver, basic instructions can be located in the online Knowledge Base article titled "Troubleshooting 3D Camera View Display Problems" in the Related Articles section below.
If none of the above suggestions resolves the issue with z-fighting, please use the File> Backup Entire Plan/Project tool to backup your plan file along with all associated textures, backdrops and images, and send the file to our Technical Support department via the Online Support Center.