I can't edit anything in simulate mode

There’s something wrong here. I can’t edit anything in simiulate mode. I don’t know if this ever worked, or if I’m using the function wrong.

Unreal Engine v4.21 and 4.3

Steps to reproduce

  1. Create a new project
  2. Enter simulate mode
  3. Try to move an item by using the translator control
  4. The transform will move but the object will not
  5. select “Keep Simulation Changes”
  6. Get the message “No propertiers were copied”

The same issue arises with the rotation control
These values will not take in the details panel either

The scale tool does work under simulate.

This is not a show stopper for me, but could become a really big annoyance on more complex projects. This especially the case for physics simulations.

As a side note, and not sure if this is a separate bug, but undo doesn’t work in simulate mode. No changes will be undone. Undo mode will simply do nothing, and then roll back to the next latest action.

Thanks!

Hello,

Thank you for your report. We were not able to investigate this on the engine version you reported, but there have been many version changes to UE4 since this question was first posted. With a new version of the Engine comes new fixes and it is possible that this issue has changed or may no longer occur. Due to timetable of when this issue was first posted, we are marking this post as resolved for tracking purposes.

If you are still experiencing the issue you reported in the current engine version, then please respond to this message with additional information and we will investigate as soon as possible. If you are experiencing a similar, but different issue at this time, please submit a new report for it.

Thank you

I forgot that I posted this, however I did discover the solution after a long time later. There is a piece of information missing from the documentation on this page:

Because of the way Unreal Engine renders graphics, if your object is not set to “moveable” you won’t be able to move it during simulation. Simple as that. You will be allowed to set moveable to on or off even after starting the simulation so there isn’t a need to stop the simulation prior to changing your object to moveable. Bear in mind, if you change an object from moveable to static you will need to stop the simulation to rebake your lighting.

If your object is set to static or stationary then your lighting is baked in and then if you were allowed to move your object it would simply disappear because it’s not rendered separately from the scene. Your object and its lighting are a part of the first rendering pass instead of another.

I imagine the same thing is happenign with brushes as they are all preview renders prior to light baking.

Cheers,