graphics3d - Image option is initialized when a graphic is in { }

It is helpful(necessary)to read the following before proceed:

view is not fixed completely regardless of vewpoint

I found that, if a graphic code is surrounded by { }, the output becomes as if the code contain 'PreserveImageOptions->False'.

In detail, I think the four codes are practically identical.

1. {Graphics3D[Cuboid[], ViewPoint -> {1,1,1}]}

2. {Graphics3D[Cuboid[], ViewPoint -> {1,1,1}, PreserveImageOptions -> True]}

3. {Graphics3D[Cuboid[], ViewPoint -> {1,1,1}, PreserveImageOptions -> False]}

4. {Graphics3D[Cuboid[], ViewPoint -> {1,1,1}, PreserveImageOptions -> Automatic]}

And 'the output of above four codes'

is equal to

'the output of the following code with surrounding { }'

Graphics3D[Cuboid[], ViewPoint -> {1,1,1}, PreserveImageOptions -> False]

Now,

1) Am I thinking correctly?

2) Why previous image options are all ignored, when a graphic is in the curly bracket?

Comments

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