DMX Fixture POP tanks fps on grid

POPs
1

Was looking at using the DMXFixture POP for a volumetric LED installation Im running this month.

Popping it after a grid of about 2000 LEDs completely tanks the project.

Here is an example demonstrating that.

DMXFIXTURETANKFPS.toe (5.5 KB)

Curious as to why this might happen. I am guessing there is a GPU to CPU to GPU thing going on? I’m on an M1 Mac so I would expect that memory transfer hit to not apply.

2

I was seeing similar result too. (M1 Macbook as well)

I noticed the issue is less severe when using a line POP and copying that to create the 3D grid. It also becomes less severe when using grid POP and setting the connectivity to “none”.

dmxTank_0A.toe (4.5 KB)

3

ahh clever with the no point prims! This is a great fix. From what I can tell I only need the point prims whenever I’m rendering the pre vis so for now I’ll just pop those in front of any vis stuff I do

4

Thanks for the report. We’ll take a look into it.

5

We’ve made some performance improvements to the DMX POPs that are in the first experimental release (2025.30060). There is still more room for improvement and it’s a work in progress, but if you want to send in anymore test cases then we’ll gladly take a look.

There is still the issue of using connectivity other than ‘None’, but we will continue to look into that.

6

We’ve fixed the high cook times in the DMX Fixture POP when using Point Prim connectivity. The fix will be in the next experimental build we release: 2025.30154+.