When enabling an previously invisible layer the whole scene recompiles again - which sums up to a lot of time waiting if one wants turn on and off some layers while using the proRender interactive (raytraced) view.
On the other side, just adding geometry by creating a Box, does not force proRender to recompile and is thus smooth and fast.
Cheers, Rudi
It’s likely not recompiling kernels but instead delivering the layer data to ProRender and restarting the render. I logged a bug to improve the output text on the render window.
Just did a test with a larger model and a single box on a layer. Turns out that it works fine / fast. Only when there is a lot of geometry on that layer, the viewport takes some time to rerender…
So my mistake, sorry.
Cheers