As you can see from the image below, when I plot 3D surfaces, regions, etc, they render as though there was no light source (left is Mathematica's help documentation, right is how it renders for me):
RegionPlot3D[x^2 + y^3 - z^2 > 0, {x, -2, 2}, {y, -2, 2}, {z, -2, 2}]
This is just an example - but it happens every time.
Weirdly, when I rotate the image, the rendering temporarily renders normally - but only while I'm rotating; the moment I release the mouse, it goes back to being light-less.
Any idea what's wrong, and how to fix it?
I'm not aware of having made any preference changes - wouldn't know how to...
I use Mathematica 12.1.00 for MacOs X (64-bit). And I should add that the problem has been going on for months - restarts make no difference, global clearing makes no difference.
UPDATE:
In answer to @Edmund's question below, the Lighting
setting makes no difference. Here is an example with Lighting->"Standard"
:
And if I click to rotate the same graphic, it suddenly looks like this - but only while I am rotating it:
Options[RegionPlot3D, Lighting]
return when evaluated? $\endgroup$*{Lighting -> Automatic}*
. However, I have now tried adjusting theLighting
setting to"Standard"
and"Directional"
and the problem remains... $\endgroup$