I hope you are doing well during these trying times.
Thank you for sharing the issue!
From your screenshot, I can think of 2 settings that can affect how the light/shadow affects a material in 3D window.
1. Sunlight intensity
This Intensity value multiplies the Brightness component of the Sunlight color. The higher the value, the brighter the color. In this case, because the light was too strong, the texture of stucco disappears due to the brightness (imagine you over-exposure a picture. The highlight (bright) area will become too bright and lose details).
2. Material's ambient
The Ambient control sets the percentage of ambient light the surface is able to reflect. This determines how much a surface is subject to brightening effects (as opposed to shades or highlights caused by directional light). If this set to very low, the material will not reflect any light in the transitional zone. As in this example, if I set Ambient to 0, the dark zone of the brick becomes completely black.
There are some other settings that may affect how light and shadow appear on a surface. I suggest playing around with the settings above to get the desired look. Let me know if this helps!
Thank you very much!
Technical Support Engineer
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