Don't know if the d3d/refresh flags are still supported in the engine? Anyways I tried something like this and the results are very strange. Not the pixalation, but the image repeats and doesn't grow/shrink with the window.

C-Script Code:

---

PANEL gfx_panel { bmap = "gfx.bmp"; flags = d3d, refresh, filter, visible; }

function another_mode1()
{
	video_set(800,600,0,0);
}
function another_mode2()
{
	video_set(1024,768,0,0); // original size of image
}
function another_mode3()
{
	video_set(1680,1050,0,0); // max resolution on my monitor
}

function main()
{
	fps_max = 60;
	
	video_set(1024,768,32,1);
	
	while(1)
	{
		gfx_panel.scale_x = screen_size.x;
		gfx_panel.scale_y = screen_size.y;
		wait(1);
	}
}

	on_1=another_mode1;
	on_2=another_mode2;
	on_3=another_mode3;

---

Lite-C Code:

---

#include <acknex.h>
#include <default.c>

PANEL* gfx_panel = { bmap = "gfx.bmp"; flags = VISIBLE; }

function another_mode1()
{
	video_set(800,600,0,0);
}
function another_mode2()
{
	video_set(1024,768,0,0);
}
function another_mode3()
{
	video_set(1680,1050,0,0);
}

function main()
{
	fps_max = 60;
	
	video_set(1024,768,32,1);

	on_1=another_mode1;
	on_2=another_mode2;
	on_3=another_mode3;
	
	while(1)
	{
		gfx_panel.scale_x = screen_size.x; // size works, but repeats
		gfx_panel.scale_y = screen_size.y; // scale gives just black
		wait(1);
	}
}

---