The difference between LOL1 and LOL2 is, that LOL1 has a resolution of 320x240 and LOL2 a resolution of 640x480. Now there are two possibilities and I'm not sure which them is true (because I don't have a screen with a high enough resolution):
-DOSBOX uses this scaling option for 320x240 only and ignores it for 640x480
-DOSBOX ignores the scaling option, if the resulting window would exceed screen dimensions. For example: If you triple 640x480 you arrive at 1920x1440 which is above most monitor resolutions.

BTW: For the best fullscreen experience change the line "fullresolution=original" to your desired screen resolution. This way you can also determine your preferred window size (just change "windowresolution=original" to "windowresolution=1280x960" for example)

ah ok that makes sense. thanks for the information.

i added the 'forced' switch to end of the scaler line i.e. "scaler=tv3x forced" and it worked. it was indeed bigger than the screen as you mentioned so i set it down to tv2x scaling and everything is great. thanks again.

The actual native res for LoL2 is 640x400 (the manual points this out, and that 640x480 will actually distort the picture a bit.) I prefer to run DOSbox (I only use the GLIDE-supporting versions even though LoL2 is the only thing I use with GLIDE at the moment) at my monitor's native res of 1920x1200 whenever possible (full screen.) LoL2 looks and plays great at that resolution...! I run it with the direct3d output and the hq2x.fx shader, as well. It doesn't interfere with the Glide acceleration at all. (fullscreen=1920x1200.)

If you are going to use a scaler, I think you'll find that the hqx2/x3 scalers are hard to beat--no scanlines or other artifacts.

Actually, you can achieve the same effect (I assume you just want the image to fit your entire TV/monitor not leaving any gaps) by setting ASPECT = TRUE and Fullresolution=original in the dosboxLOL2.conf file.

I love GOG, but I'll never understand why they fail to do this stuff in DOSbox. I used to write my own frontends for DOSbox 10 years ago, so I imagine this is something everyone knows.