maybe you should write your own small Shader because of controlling.

Example: Set alpha to View-Bitmap (clear the bitmap)

Code

Texture TargetMap;

sampler2D SrcColor = sampler_state
{ 
	texture = <TargetMap>; 
	MinFilter = linear;
   MagFilter = linear;
   MipFilter = linear;
   AddressU = Clamp;
   AddressV = Clamp;	
};

float4 FillAlpha( float2 texCoord : TEXCOORD0 ) : COLOR0
{
	float4 color;

	color = tex2D(SrcColor, texCoord);
	color.a = 0;
	color.rgb = 1;
	return color;
}

technique PostProcess 
{
	pass p1 
	{
		AlphaBlendEnable = false;	
		VertexShader = null;
		PixelShader = compile ps_1_0 FillAlpha();
	}
}


MATERIAL* MatObjFillAlpha =
{	
	effect ="FillAlpha.fx";		
}


Code

View.bmap = bmap_for_entity(my, 1);
bmap_process (View.bmap, NULL, MatObjFillAlpha);



And your bmap_process is wrong, set NULL to Source.




If you want to set Alpha Channel to Emboss, set AlphablendEnable to true and set Color.a

Code
Texture TargetMap;
sampler2D g_samSrcColor = sampler_state { texture = <TargetMap>; MipFilter = Linear;	};

float4 vecViewPort;

float4 postprocessing_emboss( float2 Tex : TEXCOORD0 ) : COLOR0 
{
   float4 Color = float4(0.5,0.5,0.5,1.0);
	Color -= tex2D( g_samSrcColor, Tex.xy-vecViewPort.zw)*2.0f;
	Color += tex2D( g_samSrcColor, Tex.xy+vecViewPort.zw)*2.0f;	
	Color.rgb = (Color.r+Color.g+Color.b)/3.0f;
	Color.a = 0.2; 
	return Color;
}

technique PostProcess 
{
	pass p1 
	{
		AlphaBlendEnable = true;
		VertexShader = null;
		PixelShader = compile ps_2_0 postprocessing_emboss();
	}
}





Last edited by Ayumi; 04/21/20 21:49.