Hi T.Z.
Well, I would need more information on what you want to spawn and your spawn point configuration to really help you out…
How many spawn points to you have in each room?
Did you move the spawn points around in the room? (they do not need to be at the center: move them around and reduce the randomizing factor to avoid collisions with walls, etc.)
How different are your spawnables size-wise?
How big are your spawnables compared to your room volume?
But here are the basics:
You can move the spawn points around in the room AND also put a little randomized position on what you spawn, so your spawnables/walls do not intersect. You can play with the spawn point buttons to get an idea of how your elements spawn in the room and the effect of position/rotation/size randomization.
Also, if you want to spawn multiple items (like 2/3 spiders) at a single spawn point, I would suggest you create a spawnable with 1 spider, a spawnable with 2 spiders and a spawnable with 3 spiders. Your spawn point only spawns 1 element, composed of 1 or more spiders positioned in a way that they never intersect.
Does this help you out? 🙂