I can't move camera when sitting on certain furniture.

[lomemori]

I know there are some furniture you can just move your camera angles with wasd or arrow keys, even with scroll keys in order to zoom in and out.

Certain furniture like Darkfold products are not able to move the camera angle, it just locked the angle. Zoom in/out with scroll wheels won't work as well. 

Is it something to do with the script inside of the furniture that I require to discuss with the creator? 

Or is there any tips to escape from the camera angle lock like that by chance?

[Qie Niangao]

There's a pair of script functions that are involved here, llSetCameraAtOffset and llSetCameraEyeOffset which set parameters of the link in which the functions execute, and thereafter anybody who sits on that link will have their cam moved accordingly. Because it's a parameter of the object, this will keep happening even after the script is removed, until the settings are "scrubbed" with another call of those functions using a special ZERO_VECTOR value.

(There's also a function, llSetLinkCamera,  that will set these parameters in a different link from that in which the function itself is called. I know, this is very deep in the weeds.)

Furniture makers often use these functions because otherwise, depending how the user's cam in pointed when they sit, it can often start out buried behind a wall behind the furniture, which new users especially find very confusing. I don't know anything about Darkfold products, but some "sit scripts" have options to use these functions, or not, or another more complicated and powerful mechanism of adjusting the sitter's cam, based on the llSetCameraParams function.

Experienced users very often rely on a completely different way of controlling their cams based on dragging the mouse with keyboard modifiers pressed, which they use constantly while in-world, and while the cam is already pulled away from the default position it won't be affected by these functions and the user will just continue constantly controlling their cams never affected by these furniture settings.