How to choose proper 640x480?

[retro86]

I am using an SLG3000 scanline generator, which adds scanlines to a 640x480 signal. I get scanlines with all emulators when I select 640x480, but with 4DO, the scanlines don't appear when I select the mode to double the 320x240 resolution to 640x480. I can only assume that the program isn't displaying a proper 640x480 resolution.

How do I get it to run at 640x480? If the program hasn't got the option, is there a way I can force it to output the resolution I want?

Thanks for any help.

[BryWI]

Those options only change the internal 3do drawing resolution. Currently, 4DO Fullscreen uses your current set resolution. You will have to manually set your screen resolution to 640x480.

[retro86]

You will have to manually set your screen resolution to 640x480.

ok, thanks for the advice. I hope there's a resolution option in the future - if that's possible.

Cheers!