I have AutoCAD Map 3D 2013. Sometimes the fillet preview doesn't work. The fillet preview is supposed to work like this:
After setting the radius of the fillet, click on one line.
Move the cursor to other line to be filleted and wait for the preview of the fillet to appear.
If the preview of the fillet looks good, click on other line to create the fillet.
If the preview of the fillet doesn't look good, change the radius of the fillet and try again.
How can I fix this? I think that there is a variable that needs to be set.
I don't know of any variable that controls it. I even check dragmode and perspective views to see if they had an effect on it. I say it ay be your video display causing it to happen.