Originally Posted by
Griogre
@jaharmi The reason Balder's Gate and FG are similar is that FG is not usually just running text and simple graphics. With FG most of the GPU power is being used to calculate LOS and what should be visibility clipped or not clipped for every creature and player on the combat tracker. The most predictive of how much calculation the GPU power needs is the pixel size, number of colors of the map and number and complexity of the LOS oculars.
Then, if you are running two instances of FG you are basically doubling the load on the GPU to run both the GM copy and Player copy at the same time.
You might see some improvements if you Disable Line-of-sight or Disable Lighting. Disabling lighting can be really viable with outdoor maps in daylight.