Bounding box around shadow projector shadow

[Wattosan]

Hello,

I am creating shadows for my objects in scene with shadow projectors, using the Unity Standard Assets effects. However, is it possible to somehow get a bounding box around the shadow that is created on the ground?

I asked a similar question in this topic:
Bounding box around the shadow of an object
The previous topic however focus on shadows cast by objects themselves.
Is it possible to get a bounding box around the shadow, shown in the following image?

Thank you!
Cheers,
Frosty

[Wattosan]

Bump

[mgear]

since its using projector + flat floor, wouldnt that already give you all the info needed?

or brute force,

• render image with blobshadow
• render again without blobshadow
• compare pixels and find out the shadow area edges