I just recycled one old screenshot I took, and added a few more.
There should be seven bulbs in total. If not, look up and search for anything that looks like the heat bulbs.
Please note the shape of the bulbs. There are lots of smaller bulbs in the map, but those are not the mission objectives. They only contain trace amounts of stun-gas. The mission objectives cause big incendiary explosions when damaged. They're also quite distinctive, so it shoudn't be too hard locating them.
As a review of the basic strategies to take when tackling the alien dimension buildings. What needs to be done for a complete run of every building:
- Destroy the spawn pads. This stops reinforcements. Use Vortex Mines.
- Locate and destroy mission objectives. The mission briefing screen shows exactly what it is you need to destroy. Take note of it.
- Eliminate enemy resistance.
If you just want to be quick, destroy the objectives and evacuate from the mission as quickly as you can.
The complete run will work for all but the last alien building (you'll find out why when you get there). Also note, that on one mission along the way, you get to choose to capture your objective instead of destroying it. If you have toxin-C, I highly recommend capture over destruction.
NKF, narrow minded fuddy duddy who refuses to let go of the past and will not accept anything newer than 1979.