I’ve been looking at way I can share concepts with stakeholders and make it easy for them to see different options, especially in this hybrid environment. Keyshot Web Viewer looked like a great solution, but it’s quite pricey. When you explore different colour options are you putting together a presentation, rendering out all the options or simply sending a PSD?
Would just be cool to know what people are doing in case there’s some great way of showing options I hadn’t thought of. 
I work in the video game accessories industry and the creative team normally renders out PNGs of our concepts and shares them on Proof to the stakeholders to comment and make adjustments if necessary. In this day in age of GPU rendering, rending out models with up to 250 samples takes just a couple minutes. The creative teams put out hundreds of renders per season cycle and with our machine capabilities, it is not much of an issue to just share renders.
This is also not just for products, but we do product packaging renders, FSDU/PDQ renders, and our marketing team also develops renders for social and marketing assets as well.
mostly just drag em into a template and send as .pdf in an email
for non-tech people i found it’s the best way, they won’t be opening .bip files or install viewer software
Mostly I send them emails but some times brief them in voice or connect with Fm whatsApp. Its easy and quite comfortable.
My choice is png files, converted to sRGB colorspace. It’s the safest option for viewing on any possible platform, I think.
i do screen shots and shoot them over teams or email. Im not normally presenting loads of colors and that sort of options, mine are more technical in nature. Is the product mounted on the machine properly? is it aimed in the right direction? what colors should the indicators be for this situation? are the finishes of the materials correct (since we never see samples of the products anymore)
It would be great to have a “proof sheet” function whereas you could setup the configurator, or just like the queue add studios / multimaterials and or cameras, and have KS render a super quick snapshop of each and make a contact sheet. that would be fantastic for project archving too, so someone could open the pdf ocntact sheet and see all the images that came from that bip file without having to open it.