Thea for SketchUp can operate either in Interactive or Production Mode. Even if we have selected a high resolution from the Camera Tab (Thea Tool window) while rendering in Interactive Mode, the resolution adapts to the size of the Thea Darkroom window. The same thing happens when we the in SketchUp window option is active.
Unbiased TR1/TR2 and Adaptive BSD, will always render in full resolution because they only operate in Production Mode.
For the rest of the engines, Presto AO/MC and Adaptive AMC, we will have to switch to Production Mode in order to render in Full Resolution. We can do so by unchecking the Interactive check-box from Thea Darkroom.
You can find out more in the following video…