On Windows, if the device display looks like this when running Android 8 or above:
Then, it may be caused by the following:
1. Your graphics card does not match Genymotion Desktop requirements
Please refer to Genymotion Desktop hardware requirements.
2. Your display drivers are not up-to-date.
Please upgrade them to their latest version.
Due to a bug with Intel drivers, Genymotion Desktop is not compatible with Intel HD 3000 on Windows.
3. You are using a laptop with a discrete GPU (Nvidia or AMD) and an integrated GPU (Intel)
You may need to force Genymotion Desktop (player.exe) to use the NVidia or AMD high-performance discrete GPU instead of Intel low-performance IGP.
See this article.