Have Bloom Not Affect Skybox

[gamecreator]

Is there a way to have the bloom shader only affect the scene, not the skybox?  I like the effect it has on my scene but it washes out a lot of details in the background.

Left is no bloom, right is bloom.  (This is with a second directional light in the scene, by the way, out of necessity.  And I know the skybox is crappy quality.  It's the best I could find for a desert for now.)

[havenphillip]

Did you ever solve this? I came up with one possible solution with a little adjustment to the bloom shader that I believe is the one that comes with Leadwerks. You just have to change the fragment part to this:
 

#version 400

uniform sampler2D texture0;
uniform sampler2D texture1;
uniform sampler2DMS texture2;
uniform bool isbackbuffer;
uniform vec2 buffersize;
uniform float currenttime;
uniform float intensity = 4.0;

out vec4 fragData0;

void main(void)
{
    vec2 coord = vec2(gl_FragCoord.xy/buffersize);
    if (isbackbuffer) coord.y = 1.0 - coord.y;

    ivec2 icoords = ivec2(coord * buffersize);

    vec4 blur0 = texture(texture0,coord);
    vec4 scene = texture(texture1, coord); // rendered scene
    vec4 blur2 = texelFetch(texture2, icoords, 0); //glowmap

    fragData0 = clamp((scene+blur2*(blur0*intensity)),0.0,0.9);
}

/*

//original shader
#version 400

uniform sampler2D texture1;
uniform sampler2D texture2;
uniform bool isbackbuffer;
uniform vec2 buffersize;
uniform float currenttime;
uniform float intensity = 2.0;

out vec4 fragData0;
void main(void)
{
    vec2 icoord = vec2(gl_FragCoord.xy/buffersize);
    if (isbackbuffer) icoord.y = 1.0 - icoord.y;
    
    vec4 scene = texture(texture1, icoord); // rendered scene
    vec4 blur = texture(texture2, icoord); // glowmap
    fragData0 = clamp(scene + (blur*intensity), 0.0, 1.0);
}*/

[gamecreator]

Hey, I just saw your post.  May be a silly question but which file are you modifying?  I don't have anything that looks like your original shader.  I thought it might be the bloom.shader file in the Shaders\PostEffects\Utility folder.  It has a section that looks close but different:

Quote

#version 400

//-------------------------------------
//MODIFIABLE UNIFORMS
//-------------------------------------
uniform float cutoff=0.15;//The lower this value, the more blurry the scene will be
uniform float overdrive=1.0;//The higher this value, the brighter the bloom effect will be
//-------------------------------------
//
//-------------------------------------

uniform sampler2D texture0;//Diffuse
uniform sampler2D texture1;//Bloom
uniform bool isbackbuffer;
uniform vec2 buffersize;
uniform float currenttime;

out vec4 fragData0;

void main(void)
{
    vec2 icoord = vec2(gl_FragCoord.xy/buffersize);
    if (isbackbuffer) icoord.y = 1.0 - icoord.y;
    vec4 scene = texture(texture0, icoord); // default
    vec4 blur = (texture(texture1,icoord)-cutoff); // glowmap
    blur.r = max(blur.r,0.0); blur.g = max(blur.g,0.0); blur.b = max(blur.b,0.0);
    float pixelbrightness = scene.r * 0.3 + scene.g * 0.59 + scene.b * 0.11;
    fragData0 = scene + (overdrive * blur * max(0.5, 1.0 - overdrive * pixelbrightness ));
    //fragData0=blur;
}

I tried replacing it anyway with your version but it didn't work for me.

[havenphillip]

There's a bloom.lua and a bloom.shader in my post effects folder. I assumed those came with Leadwerks. I don't know where I got them, then.  I'll see if I can make it work with the one you posted. I have that one, too, somehow.

This is the one I'm using:

-----------------------------
-- Simple post effect script
-----------------------------
--Called once at start
function Script:Start()
    --Load this script's shader
    self.shader = Shader:Load("Shaders/PostEffects/bloom.shader")
    self.shader_hblur = Shader:Load("Shaders/PostEffects/hblur.shader")
    self.shader_vblur = Shader:Load("Shaders/PostEffects/vblur.shader")
    self.shader_bright = Shader:Load("Shaders/PostEffects/brightpass.shader")
end

--Called each time the camera is rendered
function Script:Render(camera,context,buffer,depth,diffuse,normals)
    
    --Create downsample buffers if they don't exist
    if self.buffer==nil then
        local w=buffer:GetWidth()
        local h=buffer:GetHeight()
        self.buffer={}
        self.buffer[0]=Buffer:Create(buffer:GetWidth(),buffer:GetHeight(),1,0)
        self.buffer[1]=Buffer:Create(w/2,h/2,1,0)
        self.buffer[2]=Buffer:Create(w/4,h/4,1,0)
        self.buffer[3]=Buffer:Create(buffer:GetWidth(),buffer:GetHeight(),1,0)
    end
    
    --Save for bloom pass
    buffer:Disable()

    --Brightpass
    self.buffer[0]:Enable()
    self.shader_bright:Enable()
    diffuse:Bind(1)
    context:DrawImage(diffuse,0,0,buffer:GetWidth(),buffer:GetHeight())
    self.buffer[0]:Disable()

    --Downsample
    self.buffer[0]:Blit(self.buffer[1],Buffer.Color)
    self.buffer[1]:Blit(self.buffer[2],Buffer.Color)
    self.buffer[2]:Blit(self.buffer[3],Buffer.Color)
    
    --hblur
    self.buffer[0]:Enable()
    self.shader_hblur:Enable()  
    self.buffer[3]:GetColorTexture():Bind(1)
    context:DrawImage(self.buffer[3]:GetColorTexture(),0,0,buffer:GetWidth(),buffer:GetHeight())
    self.buffer[0]:Disable()

    --vblur
    self.buffer[3]:Enable()
    self.shader_vblur:Enable()
    self.buffer[0]:GetColorTexture():Bind(1)
    context:DrawImage(self.buffer[0]:GetColorTexture(),0,0,buffer:GetWidth(),buffer:GetHeight())
    self.buffer[3]:Disable()

    --bloom
    buffer:Enable()
    self.shader:Enable()
    diffuse:Bind(1)
    tex=self.buffer[3]:GetColorTexture()
    tex:Bind(2)
    context:DrawImage(self.buffer[3]:GetColorTexture(),0,0,buffer:GetWidth(),buffer:GetHeight())
end

--Called when the effect is detached or the camera is deleted
function Script:Release()
    if self.shader then
        self.shader:Release()
        self.shader = nil
    end
    if self.shader_vblur then
        self.shader_vblur:Release()
        self.shader_vblur = nil
    end
    if self.shader_hblur then
        self.shader_hblur:Release()
        self.shader_hblur = nil
    end
    if self.shader_bright then
        self.shader_bright:Release()
        self.shader_bright = nil
    end
    --Release buffers
    if self.buffer~=nil then
        self.buffer[0]:Release()
        self.buffer[1]:Release()
        self.buffer[2]:Release()
        self.buffer[3]:Release()
        self.buffer=nil
    end        
end

 

Then the bloom shader is :

//Fragment

 

#version 400

uniform sampler2D texture0;
uniform sampler2D texture1;
uniform sampler2DMS texture2;
uniform bool isbackbuffer;
uniform vec2 buffersize;
uniform float currenttime;
uniform float intensity = 4.0;

out vec4 fragData0;

void main(void)
{
    vec2 coord = vec2(gl_FragCoord.xy/buffersize);
    if (isbackbuffer) coord.y = 1.0 - coord.y;

    ivec2 icoords = ivec2(coord * buffersize);

    vec4 blur0 = texture(texture0,coord);
    vec4 scene = texture(texture1, coord); // rendered scene
    vec4 blur2 = texelFetch(texture2, icoords, 0); //glowmap

    fragData0 = clamp((scene+blur2*(blur0*intensity)),0.0,0.9);
}

//Vertex

#version 400

uniform mat4 projectionmatrix;
uniform mat4 drawmatrix;
uniform vec2 offset;
uniform vec2 position[4];

in vec3 vertex_position;

void main(void)
{
    gl_Position = projectionmatrix * (drawmatrix * vec4(position[gl_VertexID]+offset, 0.0, 1.0));
}

 

 

 

[gamecreator]

Thank you.  I'll try it in a bit.  Are you on default or beta?

[havenphillip]

I don't know. How would I check that?

I tried it with that other script. It got too complicated and I gave up. I couldn't manage to isolate the skybox.

[gamecreator]

In Steam, if you right-click on Leadwerks, go to Properties and Betas tab, you'll see if you're opted in.  But the one that is generated with release for me is 1,767 bytes and this is the entire thing:

SHADER version 1
@OpenGL2.Vertex
#version 400

uniform mat4 projectionmatrix;
uniform mat4 drawmatrix;
uniform vec2 offset;
uniform vec2 position[4];

in vec3 vertex_position;

void main(void)
{
	gl_Position = projectionmatrix * (drawmatrix * vec4(position[gl_VertexID]+offset, 0.0, 1.0));
}
@OpenGLES2.Vertex

@OpenGLES2.Fragment

@OpenGL4.Vertex
#version 400

uniform mat4 projectionmatrix;
uniform mat4 drawmatrix;
uniform vec2 offset;
uniform vec2 position[4];

in vec3 vertex_position;

void main(void)
{
	gl_Position = projectionmatrix * (drawmatrix * vec4(position[gl_VertexID]+offset, 0.0, 1.0));
}
@OpenGL4.Fragment
//This shader should not be attached directly to a camera. Instead, use the bloom script effect.
#version 400

//-------------------------------------
//MODIFIABLE UNIFORMS
//-------------------------------------
uniform float cutoff=0.15;//The lower this value, the more blurry the scene will be
uniform float overdrive=1.0;//The higher this value, the brighter the bloom effect will be
//-------------------------------------
//
//-------------------------------------

uniform sampler2D texture0;//Diffuse
uniform sampler2D texture1;//Bloom
uniform bool isbackbuffer;
uniform vec2 buffersize;
uniform float currenttime;

out vec4 fragData0;

void main(void)
{
	vec2 icoord = vec2(gl_FragCoord.xy/buffersize);
	if (isbackbuffer) icoord.y = 1.0 - icoord.y;
	vec4 scene = texture(texture0, icoord); // default
	vec4 blur = (texture(texture1,icoord)-cutoff); // glowmap
	blur.r = max(blur.r,0.0); blur.g = max(blur.g,0.0); blur.b = max(blur.b,0.0);
	float pixelbrightness = scene.r * 0.3 + scene.g * 0.59 + scene.b * 0.11;
	fragData0 = scene + (overdrive * blur * max(0.5, 1.0 - overdrive * pixelbrightness ));
	//fragData0=blur;
}

Try creating a new project and see if Leadwerks creates this for you too in the Utility folder.

[Yue]

I'm going to distort this question a bit. Is it possible to modify the ground shader so that it casts shadows?

[havenphillip]

Mine says "NONE - opt out of all beta programs." I do have that shader, too.

[havenphillip]

31 minutes ago, ?Yue? said:

I'm going to distort this question a bit. Is it possible to modify the ground shader so that it casts shadows?

What do you mean? You're not getting any shadows? Which ground shader?

[Yue]

 

It's just that the terrain doesn't produce shadows.
Inside the shaders I see some that say terrain.

I'd expect the hill to cast a shadow over the same terrain.

 

 

 

[havenphillip]

1 hour ago, ?Yue? said:

 

It's just that the terrain doesn't produce shadows.
 

That's weird. I never noticed that. This is probably way beyond me. I don't know the terrain shaders at all. I think casting shadows has to do with materials, and you can't put materials on the terrain.

[Yue]

It's quite strange why this doesn't happen, you see strange effects when I want to simulate a sunrise, and I've never been able to understand why Leadwerks doesn't do this.

[havenphillip]

Yeah I agree. I give Josh the benefit of the doubt, though. There's only so much one guy can do. If the demand for it was high enough I'm sure he'd put that in. There has to be a solution out there somewhere. We just got to find it ourselves.

[gamecreator]

2 hours ago, havenphillip said:

Mine says "NONE - opt out of all beta programs." I do have that shader, too.

I only have one in the Utility folder.  I'm guessing you downloaded another somewhere.  Would you mind attaching the files to a post?

[havenphillip]

Yeah this should be everything involved.

 

bloom.zip

[gamecreator]

Here are the three versions (no bloom, default bloom, your bloom).

Your bloom definitely does a much better job of not affecting the background (though it still alters it a bit).  Thanks much for sharing this.