Request for creation of floor hotspot in Google Street View style, like as Arrows Plugin https://krpano.com/plugins/userplugins/arrows/ or GArrows... BUT without permanent update events (onviewchange etc.) and also maybe without POLYGONAL concept or borderhittest="true"... we need something light that does not strain the processor, possibly on new capabilities like Three.js or another original solution. How much will it cost? Free , if future box version from native developer / Third-party Public plugin / White Label (unbrand) custom open-source with personal order.
You can also email gumirj[at]gmail[dot]com Thnx