Shiny wet pavement?

texture formats   0 (plain)  d3dusage_rendertarget  d3dusage_autogenmipmap  d3dusage_dmap   

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D3DFMT_V8U8       yes        no                     no                      no

D3DFMT_L6V5U5     yes        no                     no                      no

D3DFMT_X8L8V8U8   yes        no                     no                      no

D3DFMT_Q8W8V8U8   yes        no                     no                      no

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i checked the texture formats a gf4 supports with the directx caps viewer.

maybe the following list of supported uv-offset formats is interesting? what does d3dusage_dmap mean? are there less nos with ati cards?

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nvidia geforce4 ti 4200 -> d3d device types -> hal -> adapter formats -> d3dfmt_x8r8g8b8 (fullscreen) -> texture formats

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texture formats   0 (plain)  d3dusage_rendertarget  d3dusage_autogenmipmap  d3dusage_dmap   
...
D3DFMT_V8U8       yes        no                     no                      no
D3DFMT_L6V5U5     yes        no                     no                      no
D3DFMT_X8L8V8U8   yes        no                     no                      no
D3DFMT_Q8W8V8U8   yes        no                     no                      no
...

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Just a few things to note:

Loading a bmp, the format becomes D3DFMT_R5G6B5 ( 23 )
Loading a tga, the format becomes D3DFMT_X8R8G8B8 ( 22 )

Calling bmap_to_uv(), makes it D3DFMT_V8U8 ( 60 )
Calling bamp_to_normals(), makes it D3DFMT_A8R8G8B8 ( 21 )

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 // Load the texture for the background image
    if( FAILED( D3DUtil_CreateTexture( m_pd3dDevice, _T("Lake.bmp"),
                                       &m_pBackgroundTexture, D3DFMT_R5G6B5 ) ) )
        return D3DAPPERR_MEDIANOTFOUND;

    // Create the bumpmap. 
    m_psBumpMap = CreateBumpMap( 256, 256, D3DFMT_V8U8 );
    if( NULL == m_psBumpMap )
        return E_FAIL; 

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Try this and see if something shows up other than black on the geforce.

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It's bumpy on plain Geforce 3 as well. The textures look a little bland though- 16 bit ones ?

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Signed Formats
Data in a signed format can be both positive and negative. Signed formats use combinations of (U), (V), (W), and (Q) data.

Signed format flags Value Format
D3DFMT_V8U8 60 16-bit bump-map format using 8 bits each for u and v data.
D3DFMT_Q8W8V8U8 63 32-bit bump-map format using 8 bits for each channel.
D3DFMT_V16U16 64 32-bit bump-map format using 16 bits for each channel.
D3DFMT_Q16W16V16U16 110 64-bit bump-map format using 16 bits for each component.
D3DFMT_CxV8U8 117 16-bit normal compression format. The texture sampler computes the C channel from: C = sqrt(1 - U2 - V2).

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