We did not touch anything to do with the default real weather load system. Real weather has always lagged, but to some it may not have been as noticeable till now (will depend on your system). Part of the reason it would be more noticeable for you now is because when the weather changes X-Plane is instructed to draw a new set of clouds, and unlike default clouds, SkyMaxx Pro has no two clouds alike, so you have some computer thinking going into how it should render your new scene. X-Plane is responsible for how this loads. It's actually Laminar we are waiting on to make HDR easier. At this time they do not allow plugins to read render state in HDR, which causes tone-mapping to have more of a bloom effect. Many customers have invested time into configuring SkyMaxx Pro and have actually been able to make HDR look really, really good. HDR also does multiple flight loop frame calls that can be unnecessary to the plugin, so if you have a lower end machine it can effect performance. Laminar is going to be working with adding new items into the SDK so we can have better control of these things. We are at their mercy on this front. We are looking into this one further. At first glance I believe this is tied to a dataref to kill assets from Laminar, so again there may need to be changes made on their end.