Advanced "flashlight" - layered blending and transparency

dop2000 or R0J0hound - May I request either of your help, please?

FURTHER INFO: The layer that the Flashlight object is on has "force own texture" checked and the Flashlight object, itself, is using the Destination Out blend option.

This is the part that works fine.

In order to make it so that the hidden objects on the floor stay hidden while the walls are visible, I'm trying to set it up so that the layer with "force own texture" is 75% opaque while trying to find the setting(s) that make it so the obstacle is invisible until it is overlapped with the Flashlight. It is that last part that I'm having trouble with.

What layer do I put the obstacle on?

What blend mode do I set it to? Or do I need to set another layer to a blend mode? Both?

What other layers do I need to set to "force own texture"?

I sort of understand "source" and "destination". My current understanding is that "source" is the object on top and usually the object with the blend mode active. "Destination" is the object below the "source" and sometimes on another layer.

I don't understand the question. The main useful blend modes are normal, additive and destination-out (which erases). You'd have to experiment with the other ones.

To only show stuff in the light you'd have a layer

with force own texture = yes

with transparent = no

with color = black

and the light object on that layer with destination-out (which is the same as erase).

Any layers under that will be hidden if not over that light, and any layers above will always be visible.

R0J0hound I believe I understand. Experimentation, indeed, is called for. But since this is for a game jam, I'm going to have to save that for another time. It's not a critical feature, thankfully. Thank you!