Realistic 3D view suddenly dark

[cmcdonellKKYAX]

For my schematic plans, I place two views on top of each other. The underlay is a locked realistic 3D view with a section box. The Overlay is a 2D floor plan. I align the views on a sheet at the same scale so that they read like a single rendered floor plan that still allows me to place room tags, text, etc.

The issue is that occasionally the underlaid 3D view suddenly gets a lot darker. It happens about 50% of the time after printing to PDF, and a few other random times. I've attached screenshots of how it looks normally vs the darkened glitch. Restarting Revit usually resolves the issue, but I'd like to understand why this may be happening and see if it's avoidable.  

My Graphics card is NVIDIA Quadro P5000, and my computer has 32GB of RAM, so I doubt it's a performance issue, although it seems like that must be the case.

Any clues?

  

[RDAOU]

@cmcdonellKKYAX 

Make sure that you didn't accidentally change the Visual style of the view...It can get darker if you switch from consistent colors to Shaded or realistic

Best would be that you create a view template where the Visual style is locked and apply to that 3D view

[cmcdonellKKYAX]

It's a sudden glitch, not related to any visual setting. Restarting Revit resolves the issue, which means that it's not an accidental change. I have view templates for both the 2D and the 3D view applied

[RDAOU · Accepted solution]

Then it is a graphics issue at your end

Disable used of graphics hardware acceleration under options...and/or update GPU drivers

[syman2000]

Have you try increase the sun and ambient light? See if that will help with the PDF output. If that don't work, just update the graphic card and install the latest Revit fix.

[cmcdonellKKYAX]

It's not a visual setting - I have the "normal" view set up how I'd like it to look, so I wouldn't want to change sun settings to accommodate a glitch

[cmcdonellKKYAX]

Thanks,  RDAOU.  I was hoping there was a solution within Revit, but that's what I feared. Thanks for the tip

[ToanDN]

Does that color shifting affect printing or just on screen display?  If not, I would leave the Hardware Accelerations ON for a better performance overall.  Also, check the videocard manufacturer for updated drivers see if they help.

[cmcdonellKKYAX]

It does affect printing as well, but for this view I print using raster settings, which read from Revit's darkened viewport. I'll turn off hardware acceleration for now and see if that resolves it. I'll also keep an eye out for future graphics card driver updates. 

[bayleeliu]

I had the same issue today and I solved it under file->options->colors, check if the canvas color scheme is dark, that was what happened to me (I don't know how I triggered it) So I switched it back to light and it worked.