Update README.md

Author: GitHubDragonFly

README.md

@@ -161,7 +161,8 @@ Number Type Converter
     - Mobile viewers show it as the `Browse` button
 - Any of the viewers might have bugs and interface / library related limitations
   - Some viewers might be slow to load some models, usually if using `WASM` of some library
-- Currently experimental three.js `WebGPU` support is included in the following experimental viewers:
+- Most desktop viewers will also allow you to test multiple image formats by setting either of them as a background and even turning it into an equirectangular environment
+- Currently experimental three.js `WebGPU` support is included in the following experimental viewers, either their standalone or desktop or mobile version:
   - `GLTF`, `OBJ+MTL`, `PDB` and `PLY+STL` WebGPU viewers:
   - Use either Chrome or Safari or Opera browser with its `WebGPU experimental features` enabled to test these viewers (and your computer):
     - Firefox Nightly browser seems to support WebGPU and most features seem to work properly: