
I discovered a little trick a while back and I'm not sure if the peoples around here would know it: When working with flooritems like the DM2 castle entrance, setting the first 3 pre-scaled images as NULL makes the last image scale up (remove FRONT0/SIDE0, FRONT1/SIDE1 & FRONT2/SIDE2 but you keep FRONT3/SIDE3). When this image is placed in the dungeon, it actually appears larger than the object you cloned's image. Then all you have to do is scale down the actual image you've used and darken it (to make it look further away). I've used this trick to create a DM2 entrance that can be seen from 7 squares away (it blends with the background and there's no 'pop-in').
Here's hoping that someone out there finds this as useful as I have.