Modifying colours on MSX1...?
The PAL linemixing is great, goes with zero flicker, and makes real new colors.
Even better is that it needs no engine but can be put into any screen 2 tile.
Look at this demo showing the 25 MSX1 colors 
Two new brown colors and a dark gray in there!
10 color 1,1,1 : screen 2 20 open "grp:" for output as #1 30 dim y(16) 100 y(00) = 0 110 y(01) = 0 120 y(02) = 0.53 130 y(03) = 0.67 140 y(04) = 0.4 150 y(05) = 0.53 160 y(06) = 0.47 170 y(07) = 0.73 180 y(08) = 0.53 190 y(09) = 0.67 200 y(10) = 0.73 210 y(11) = 0.80 220 y(12) = 0.47 230 y(13) = 0.53 240 y(14) = 0.80 250 y(15) = 1.0 290 nx = 256/5 : ny = 192/5 300 for y = 1 to 15 310 for x = 1 to 15 320 if x > y then 500 330 if abs(y(y)-y(x)) > 0.01 then 500 340 j = 0 350 if j and 1 then c = x else c = y 360 line(cx,cy+j)-(cx+nx-1-8,cy+j),c 370 j = j + 1 : if j < (ny-8) then 350 380 draw"bm"+str$(int(cx+4))+","+str$(int(cy+4)) 385 ?#1,mid$(str$(int(x)),2)+","+mid$(str$(int(y)),2); 390 cx = cx + nx : if cx >= 256 then cx = 0 : cy = cy + ny 500 next x,y 510 goto 510
Would be nice to get emulator support on this.
Trying to get some vertical smear in emu:
Putting openmsx to "SDLGL-PP" mode, "scaler 2", "simple" and then put blur slider to 100%.
Put bluemsx to blur. The lines keep more visible because the palette got bugs.
some MSX1 colors have exactly same brightness. recent openmsx palette change has this fixed, however still missing is the line mixing of the TV.
The more I think of it, a whole great color ability of MSX is excluded in practice because emulators dont have it.
e.g. reason for why my demo didnt have brown and dark gray is because openmsx makes the line look.
On TV (via cinch port), there is a new color without line look! (mixing those colors of same brightness, see BASIC demo)
Again, it is no flicker thing, no code, it is just in the gfx.
The TV does mix the color with the previous line, but not the brightness (so it doesnt make unsharpness).
The MSX1 has 25 colors and the MSX2 with linecolor sprites too has something crying for it.
Aside that it can be applied anywhere, screen 2, screen 4, screen 5...
The MSX has this ability like no other homecomputer, pick a new color every line.
Did I already mention how openmsx misses a major thing hint hint
