So I’ve been playing around with Niagra this morning but since there is very little info out there I have a few questions, and a couple issues (that may not be issues at all, most likely I’m doing something wrong).
First off I’m having trouble getting the “Collision Bounce” module to function. When I add it in I get the following error:
The only changes I have made are setting the emitter to a GPU sim (but this error comes up for CPUsim too, no difference), and also increased the spawn rate to 400.
The module’s tooltip says it should be placed after the “Solve Forces and Velocity” module, however moving it up/down the stack doesn’t make any difference. I also tried the old cascade trick of setting the bounds from the main toolbar but this didn’t change anything either. To make sure I didn’t mess something up I just created a new emitter and added the Collision Bounce module as before, same error comes up with no changes made. Viewing the graph says there is an error in the top left corner, but none of the nodes in the graph have an error message.
Is the Emitter Graph not supposed to be edited? I’m almost certain I saw it being edited in the GDC presentation, however anything I try to do causes an immediate crash. As an example I was trying to move the Collision Bounce node before the Solve Forces and Velocity node, but trying to disconnect a wire, or add a wire, will cause a crash.
I created an emitter and modified a few values, compiled/saved and closed the window. Then I created a new system but when I added the emitter it reset all of the values back to defaults on the emitter. Is this intended behavior? When working with Niagra should you create an emitter and immediately add it to a system instead of modifying it first?
The toolbar in Emitter and System don’t work properly with small toolbar icons, the Compile button is missing on both Emitter and System.
Emitter normal and small toolbar buttons:
System normal and small toolbar buttons:
EDIT: I have submitted a bug report for the toolbar button issues, for tracking it is:
4.20p1 Niagra System & Emitter Small Toolbar Button Missing UE-60115
Finally a quick question; There are 2 plugins for Niagra (not including the Houdini plugin), should they both be enabled or is just the Niagra plugin enough to create particle fx?
If these do turn out to be actual bugs, or not intended behavior, let me know and I will create a proper bug report for them.
If anyone else has questions or issues feel free to post them in this thread, would be a good idea to keep them all in one place.