We wish to inform that the update we made in 26.8. changes the visual look of the 3D scene from what has been the default in past.
These changes make the 3D scene look more realistic and the tone more neutral and bit more darker. Also the shader that calculates ambient occlusion (how each pixel in the scene is exposed to light) is changed which impacts shades and shadows. Also worth noting that white color will turn more grayish than pure white as light is toned down where shadows are cast.
Below is an image showing current visual quality on the left and updated on the right.
You can see the shading of the armrest being bit more stronger and the overall tone bit more darker and neutral.
As a solution to the darkening, the intensity of the scene light can be increased manually as needed, but not automatically in the Manager UI.