Hello, IES light has an unstable behavior. When i change anything on an IES light (once the distribution .IES file is placed in it's position) it can loose the configuration, and it rotate the IES distribution. To avoid this, i have to switch between PLANE and SPHERE to recover the right rotation.
I'm not using the rotation slider, just rotating the geometry of the light with it's .IES distribution. If i don't touch anything it. seems the IES is stable, but not sure about this.
Is there a way to keep the IES Lights stable, even if i change any parameter?