Light and framerate

[trusktr]

@torugor

72 spotlights all around the model

Ouch. Lights have a cost. WebGLRenderer has a limit. WebGPURenderer may help speed it up, but not sure if Three has it yet.

Also it depends. Are you enabling shadows? That’s more cost.

See here for ideas:

Optimizing Point Lights

Hello there I was thinking about how we can improve current dynamic light limit in three.js. In a small scene my NVidia GTX 960 could only render 50 point lights before dropping frames. I chose point lights for this as its the most usual case for large number of lights. The simplest method seems to be range check. Currently in Phong material every shaded pixel will iterate over every light to calculate it’s contribution and all materials share the same lights list uniform. Its…

You’re best bet for lowest effort is redoing the asset with much less than 72 lights.

You can also “bake the lights” into the texture if the lights will not change dynamically in realtime.