I’ve been playing around with generating hdr maps using various techniques in touch, and some amazing looks can come about from this + pbr workflow.
Generating/caching the spherical harmonics mipmap lookup understandably takes some serious time so that will have to remain a non real-time process, however it would be really awesome if one could blend between several prefiltered specular Prefilter TOPs In real-time.
A switch top or otherwise does not seem to keep the mipmaps intact. I’d be fine writing a glsl shader to fade between some inputs but not even sure if it’s possible to access the mipmap levels in a top like that.
Assigning different Prefilter TOPs to the specular input of an environment light comp happens instantly which leads me to believe that this could be interpolated too.
Thanks!
Lucas