Thanks for your praises, it does help with the motivation to continue 
Would you gain fps (or otherwise free up resources for things like music etc.) if the output frame would be smaller? Say 192x128 pixels or something like that?
The output frame is already smaller due to the "Outrun-type" geometry parameters.
A flat road is rendered in a 256x72 rectangle (y values from 140 to 211).
I do not feel the need to work on the fps right now, as the result is good.
If the framerate drops when I add background, other sprites, music, then I'll work on it.
Can you make the difference on the road between the dark grey and light grey stripes a bit less visible? It gives a stroboscopic effect now. When you look at the original Out Run, the difference between the two grey colors is less obvious and intrusive.
I know, I feel the same as you. I already tried but the RGB values on the MSX2 do not give much room for a subtle grayscale. The dark grey is (4,4,5) and the light gray is (5,5,6).
In Outrun, the light gray is (144,144,144), the dark gray is (152,152,152), which unfortunately translates for MSX2 into (4,4,4) for both colors. In fact, I am considering dropping the color difference for the road, and keeping it only for the shoulder. The strips would then replace color as a way of visually separating the segments.
In Outrun, the light gray is (144,144,144), the dark gray is (152,152,152), which unfortunately translates for MSX2 into (4,4,4) for both colors. In fact, I am considering dropping the color difference for the road, and keeping it only for the shoulder. The strips would then replace color as a way of visually separating the segments.
You could make use of dithering mixing these two grey colors to get an "extra" grey between them. Besides the resulting grey will be more similar. IMHO removing this effect in the tarmac will affect the speed feeling.
