after adding several 3D models with collision (2D solid enabled), you may encounter a bug where the game will crash whenever "solid" is enabled in the decoration settings if any 3D model is assigned to it.....

This bug will ONLY ever happen if you've ever prevviously deleted a 2D decoration entity which had a 3D model assigned to it at the time of deletion....

The bug happens because efpse incorrectly references the 3D model ID which no longer exists - so the model never loads (even though it's no longer needed). You may notice this in you game.startup file. It will fail at line: Loading model ""

There are 2 ways to fix it - first method requires deleting all entities, save project, re-make all 2d decorations and re-assign all 3D models and remake the map from scratch.

The second method is far simpler and requires a decoration.dat edit, a map-edit, then save project.

*it also appears to randomly fix itself after messing around with deleting/importing 3D models.

Step1- remove all the models that cause the bug from the map. Save the project and run it.

Step2- close efpse, open the "decorations.dat" file and re-type all the decoration references in a sequential order (no gaps).

Step3- re-open efpse and load the project. All the 3D model ID's are fixed (not bugged) but model ID order on map is now incorrect. Unfortunately, you need to replace all the 3D models on the map (which may be quite a bit of work, depending how many models you used on the map)...

but now, when you re--enable "solid", everything will work properly and if it ever happens again, you only need to reposition one model, instead of them all..