viewport light & shadows doesnt function

[LuckyST]

I cant enable the viewport l&s. I have nvidia gtx275, and it's supposed to have shader model 4.0 and yet "diagnose video hardware" says I have sm1.0.

 

I installed new drivers, disabled aero (I'm in vista 64), and nothing helped.

any tips from you guys?

 

and yes, I have set the viewport display to directx 10 ,

 

 

 

here's what my "diagnose hardware" says.

 

//////////////////////////////////////////////////////

////////// Review GPU Feature Support ////////////

//////////////////////////////////////////////////////

Graphics Vendor Information: Direct3D 10.0 (NVIDIA GeForce GTX 275)

GPU Shader Model Support: SM1.0

Maximum pixel shader instruction count: 0

Viewport Shading Quality: None

Real-time Sun and Sky: Not Supported

Real-time Architectural Material: Not Supported

//////////////////////////////////////////////////////

[amer abidi]

I dont have max here, but i think Cntrl+L enables viewport lighting; and then you can choose your shadow settings from the viewport lighting configuration utility.

[LuckyST]

thanks for your input, but that turns on/off the default lighting, while I'm taking about the in scene lighting shader.

a

on my laptop it works great, while on my "beast" it's not even an option.

 

I know that the minimum shader model support is 3.0, but why is my gtx275 wrongly identified