I can not seem to get a ZBuffer working in my program. I set it up like so: DDPIXELFORMAT ddpfZBuffer; g_pD3D->EnumZBufferFormats( IID_IDirect3DHALDevice, EnumZBufferCallback, (VOID*)&ddpfZBuffer ); if( sizeof(DDPIXELFORMAT) != ddpfZBuffer.dwSize ) { REGISTER_FAILURE("ZBuffer sizes dont match!"); return FALSE; } ddsd.dwFlags = DDSD_CAPS/DDSD_WIDTH/DDSD_HEIGHT/DDSD_PIXELFORMAT; ddsd.ddsCaps.dwCaps = DDSCAPS_ZBUFFER / DDSCAPS_3DDEVICE; ddsd.dwWidth = Width; ddsd.dwHeight = Height; memcpy( &ddsd.ddpfPixelFormat, &ddpfZBuffer, sizeof(DDPIXELFORMAT) ); ddsd.ddsCaps.dwCaps /= DDSCAPS_VIDEOMEMORY; hr = g_pDD->CreateSurface( &ddsd, &g_pDDSZBuffer, NULL ); if(FAILED(hr)) { REGISTER_FAILURE("Could not create ZBuffer surface!"); return hr; } // Attach the z-buffer to the back buffer. hr = g_pDDSBack->AddAttachedSurface( g_pDDSZBuffer ); if(FAILED(hr)) { REGISTER_FAILURE("Could not attach surface!"); return hr; } The EnumZBufferCallback function is like so: static HRESULT WINAPI EnumZBufferCallback( DDPIXELFORMAT* pddpf, VOID* pddpfDesired ) { if( pddpf->dwFlags == DDPF_ZBUFFER ) { memcpy( pddpfDesired, pddpf, sizeof(DDPIXELFORMAT) ); // Return with D3DENUMRET_CANCEL to end the search. return D3DENUMRET_CANCEL; } return D3DENUMRET_OK; } And after creating the Device, I call: g_pd3dDevice->SetRenderState(D3DRENDERSTATE_ZENABLE, D3DZB_TRUE); g_pd3dDevice->SetRenderState(D3DRENDERSTATE_ZFUNC, D3DCMP_LESSEQUAL); g_pd3dDevice->SetRenderState(D3DRENDERSTATE_ZWRITEENABLE, TRUE); Without this code, I can get a spinning triangle on a blue background, when I put this code in, I get the blue background, but the triangle wont draw.Is there some initialization im missing? None of the functions return an error, and since the viewport will clear, im thinking its not a major problem in my setup. I also add the D3DCLEAR_ZBUFFER to my Clear commands. Edited by - Shaw Mishrak on 7/6/00 8:20:06 PM

Do you clear your zbuffer to 1.0f or 0.0f?
I clear to 1.0, and there is no need to change any zbuffering states... (not unless I want to do some neat tricks... )

Thanks for the help. Its solved now. Right now, im running in Hardware-Acceleration mode only and I check for possible error messages for that wasn't the problem.

Thanks,
Shaw Mishrak

Edited by - Shaw Mishrak on July 7, 2000 2:24:19 PM