App slowdown when hiding/showing lights

This topic has 5 replies, 4 voices, and was last updated 3 months ago by adamabr.

Viewing 6 posts - 1 through 6 (of 6 total)

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2024-08-01 at 11:18 pm #76352

adamabr
Customer

Is there any way to avoid the app slowdown when a light is shown/hidden for the first time?

I understand that the light has to be recalculated. But could this be done when loading the whole application?

It seems like the light calculation only has to happen once, subsequent hiding and showing works quickly.

Thoughts?

Thanks,
Adam

2024-08-01 at 11:32 pm #76357

xeon
Customer

Lights are expensive when it comes to performance. They impact redraws, triangle counts, shadow maps… and overall costly. They require lots of calculations when turned on and off. To avoid this…you may want to bake your shadows and and lights and just control lights on and off with texture changes rather than physical lights far more performant.

Xeon
Route 66 Digital
Interactive Solutions - https://www.r66d.com
Tutorials - https://www.xeons3dlab.com

2024-08-01 at 11:47 pm #76358

adamabr
Customer

That is true, however it does make a big difference in my scene. The only performance problem so far is when it is switched for the first time. I’d rather take a longer loading scene and have that be smooth later.

Wonder if we have any control over this?

I am not afraid to delve into code and mess around.

2024-08-02 at 1:12 am #76359

kdv
Participant

Before showing your scene for the first time, right after the app is loaded, turn all lights on, in a second or two turn them off and only after that hide the preloader screen.

Puzzles and JS coding. Fast and expensive.

If you don’t see the meaning in something it primarily means that you just don’t see it but not the absence of the meaning at all.

2024-08-09 at 4:49 pm #76491

masj
Participant

I ran into this recently (yes, it hits performance hard toggling the visible true<->false).
What worked for me was setting the intensity from 0 to n or vice versa. Didn’t notice any slowdown

2024-08-13 at 4:24 pm #76551

adamabr
Customer

Thanks for the input!

That sounds like a great idea masj! I’ll have to try that!
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