https://doc.babylonjs.com/how_to/use_hdr_environment
HDR, KTX, IBL, ENV, RGBM, RGBD, roughness, MipMaps, blur dropoff, polynomials harmonics, artifacts, blocking quality, LogLUV, halfFloat. A few more than 2-3, sorry. 
That’s a good hot topic that is up on the bleeding edge.
Click-on or hover-over. Those who highlight text for some reason (often in prep for a paste-into web search page)… would likely prefer the click to the hover. And, does hover exist for touch screen users? I don’t think so. shrug. Thx for interest in this, JK.
Maybe we should branch-away to a different thread. Vinc/others… do you guys have some preferences on that? Maybe “Ideas for Advanced Docs”? shrug. I’m easy… any decisions others/admin make about that… is fine with me… if okay with others. Freely move my posts.
hahah. Yuh. FUNNY! Tangled in circular drilling.
Also on the 3d-docs subject, I wonder how near we are… to putting a SMALL advancedDynamicTexture-for-a-mesh… atop an already-textured mesh (compositing). ADT’s as decals. Yeah. “Weighted Composited Materials” (Wingy nudges @Pryme8). Up to 10 overlayed materials on a mesh… with “priority weighting”. heh. (My GPU is shaking a scolding finger at me, right now.)
We want the trees, limbs, branches, twigs, leafs, fruit, nuts, etc… to maintain their correct texture… yet paste a clickable text-label atop. GPU labels 1.0? hmm. Nah, GPU probably won’t allow us to have powerful JS control over the offset/scale/wrap/ang… of the ADT-decal.
Way gone side-note: How about… each vertex of a model… CAN hold a setting… of material10 weight-priorities? In other words… when a mesh has a 10-pack of materials applied… each vert is allowed to set WHICH of the 10 materials… has priority… when the 10 materials is mapped “across” it. WOW! It does automatic material-dithers like our color-per-vertex colorKind system often produces… but they could be texture-to-texture dithers, or color-to-texture… etc. That’s just crazy… but @nasimiasl proved to us… that texture-to-texture dissolve/dither… rocks! https://www.babylonjs-playground.com/#1IAR36#15 (Hey, I didn’t invent CorelDraw, I just learned about the fun with its layers-o-composites)
Anyway… labeling in 3d… still has much advancing to do. Mouseover popup labels probably don’t work on touch, but COULD work on VR gaze… maybe annoyingly. For VR, probably glove/thimble/air-mouse… to feed standard mouseover/click systems.