If you have materials that don't show in the viewport read this.

[AubreyM]

I have never had this problem before....ever.

I was working on a model doing some textures and 2 textures would not show in the viewport. Others would but these 2 would not no matter what I did.

The show map in viewport button was enabled.

I tried a few of the other suggestions that I found online and in this forum but nothing worked.

I was using Vray but I am not sure this is specific to Vray.

I tried saving the textures to different formats, .tif,tga, even .psd, no luck.

Just for the heck of it I resized one of the textures and lo and behold it worked!

The solution was to resize the texture.

 

I have no idea why this worked. The original image was 1768x3368. When I resized it to 1238x2358 it worked fine and showed up in the viewport.

 

If any Max guru can explain this I would be interested to hear it.

[JonRashid]

Interesting. I do know that some system setups cannot handle anything bigger than 4096x4096 in realtime. They will still render but not show up in window. This is a known problem. Not come across it at lower resolutions. Have you tried the same scene on any other machine to see if it is a hardware problem or not? The 4096 thing is a resolution problem so format doesn't come into it. This seems to mimic your probs.