Most of the D3D9 renderer options control same or similar functionality as in the OpenGL renderer. D3D9 and D3D8 were based on the OpenGL renderer code and kept fairly closely in sync thus far. With D3D9 v1.2, the shader code starts to diverge a bit. Never added paletted texture support to D3D9, so ...

Yes, I'm the one who did what eventually added up to a lot of work on the renderer over the years. Haven't been working on it as much since stopped actively playing UT a number of years ago, but I still like to keep it maintained when have the time and can find something potentially useful to do. If...

It's only fairly limited use of anything HDR in this case. All the lighting changes are mesh only. The per pixel part is just Phong instead of Gouraud. The HDR part allows the total lighting contribution to extend beyond 1.0 before applying to the base texture. Easy to have extended range up to this...