Hi guys, I'm working on a project which uses DirectX 9 to render a detailed 3D scene and I have a problem. The program was developed for machines with Nvidia graphics on which it works correctly, but now it needs to be altered to run on a laptop with HD Graphics 3000 (2nd gen i7).

It seems that lighting isn't working at all; textures are visible but they look like they are being lit with white ambient lighting instead of the lights in the scene. Everything that isn't textured appears white (invisible against the white background) although some edges of objects are partially visible. Does this sound like a familiar problem to anyone? If anyone has any advice it would be greatly appreciated. I've already tried setting the program to load only one object and that didn't change anything, so it doesn't seem to be the amount of 3D data that's causing the problem.

Thanks for the help. I couldn't get PIX to work with the program, I think I'd have to strip it down to just DirectX code which would take ages because it's a massive project and the DirectX code is mixed in with lots of other classes.

I already updated the graphics driver which didn't change anything. Nik, I'm not sure what you mean by "later versions of D3D", do you mean that I should update the DirectX runtime? i.e. from here: http://www.microsoft.com/en-us/download/details.aspx?id=8109

One more thing, the renderer isn't particularly complicated in that it just uses diffuse lighting and some texturing, no shaders as far as I can tell. It's just that there is a massive amount of geometry (hundreds of MBs of .x files). I think due to this complexity the programmers who worked on it before did something to optimize the renderer for Nvidia cards which could be why the Intel GPU has trouble with it. Unfortunately the other programmers moved on a while ago so I can't ask them what they did.

Try analysing a frame with intel GPA (intel's version of Pix/Nsight). It's pretty stable, and should give you a good idea of what is going wrong.

The reason would be the lack of required shader model.

Maybe the GPU has no PS 2.0/3.0 support, which could not be emulated.

The latest Intel's GPUs work correctly, I think.