Grey blank C4D view port on start up

[Jim Scott]

Once you got a “working viewport” did you try saving a new.c4d file as I suggested earlier?

[Antony Wong]

Sorry.. I havn’t at the time.
But I just tried and it does not work..
It did work for the first time but suddenly it didn’t when I try to re-confirm if it is the fix.

[Jim Scott]

I just remembered something else.

There is an option to save a template file which when executed saves a file that is used when you first start C4D.  After that it will use your new.c4d file. 

To remove this file, open C4D preferences (Edit > Preferences), hit the button at the bottom to open the preferences folder.  In the prefs folder you should find a file called template.c4d. Delete this. Then close and reopen C4D. It should now use your new.c4d on every file, including the first one.

If that doesn’t do it, or that template file doesn’t exist, I give up.

[Jim Scott]

If it wasn’t clear, look in the “prefs” folder within the hierarchy that appears when you click on that button.

[Antony Wong]

I am afraid that I see no template.c4d:

However, I think I have some idea…
In fact, I have a dual monitor set-up + two 1080Ti,
and as far as I know, the OpenGL setting in C4D preference shows only 1 of my GPU,

what I have just found that if the c4d comes on my 1st monitor (GPU 1) after booting up, the viewport is fine.
but when it boots up on my 2st monitor (GPU 2), it greyed out, and I grad my C4D window to my 1st monitor, the viewport will then be normal again, no matter where I drag it to.

Do you think it is the fix..? or am I understanding it wrong.

[Jim Scott]

I only use one monitor so I won’t be of any help with that question. If you’ve found a workaround then go with that.

[Antony Wong]

Indeed… I think I am going to stick with it for now.

For those who encounter the same problem with me, what I do is to:
1. make sure the c4d window is on whatever monitor it shows the functioning viewport
2. save it as start-up layout (then it suppose to boot up on that monitor as well)

Also a big thank you to Jim ☺ have a good one!

[Jim Scott]

I’m glad you found a solution. And thanks for outlining what worked for you.