Enable the use of threejs lightShadows with custom shaders

[Spiri0]

Description

First of all: This point is not a high priority but it would be useful.
I can access the shadow map and shadow matrix of a light source and use it in my own shaders since r174. That's great. The problem, however, is that when I change the light position, the shadows rattle.

https://codepen.io/Spiri0/pen/NPWEQmB?editors=0010

This is probably caused by a frame delay. If I create a custom light source with its own shadow and control the update myself, it works smoothly. That's also the reason why it's not a high priority in my opinion. I can solve this by creating a customLight with a customShadow. That's just more work. Being able to use the shadow texture from Threejs light sources would be much nicer.

Solution

I suspect the cause is a frame delay. I'm not very familiar with the threejs shadow logic yet. The solution would therefore be to fix this frame delay.

Alternatives

I use my own light source with my own shadow camera. It works perfectly.

Additional context

No response

[Spiri0]

By creating my own light source sufficiently well solved