Add _rt_FullFrameDepth as IMAGE_FORMAT_NV_INTZ

[Akabenko]

Description

INTZ colored hardware depth can be as analogue of Resolved Depth buffer from SSAO_DepthPass for moders. Without extra rendering of scene.
We can see scene on our screen.

And hardware colored INTZ depth on _rt_FullFrameDepth render target.

Explanation of code

• PushRenderTargetAndViewport allow to write Hardware depth as second arg, but we need to input both args. First as colored rendertarget and second depth render target. We can't skip first argument.

• When we run PushRenderTargetAndViewport with colored and depth args, scene will gone from screen. So we need to return that, and we call pRenderContext->CopyTextureToRenderTargetEx(0, pColor, NULL, NULL); to write image to BackBuffer from colored texture.

[Akabenko]

But there is still a problem.

No 3D skybox

Activated 3D skybox

[Akabenko]

This code helps, but I think there must be a more elegant solution.

if (g_CurrentViewID == VIEW_MAIN) {
	pRTColor = GetFullscreenTexture();
	pRTDepth = GetFullFrameDepthTexture();
}

viewrender.cpp#L4994

void CSkyboxView::Draw()
{
	VPROF_BUDGET( "CViewRender::Draw3dSkyboxworld", "3D Skybox" );

	ITexture *pRTColor = NULL;
	ITexture *pRTDepth = NULL;

	if (g_CurrentViewID == VIEW_MAIN) { // extra code
		pRTColor = GetFullscreenTexture();
		pRTDepth = GetFullFrameDepthTexture();
	}

	if( m_eStereoEye != STEREO_EYE_MONO )
	{
		pRTColor = g_pSourceVR->GetRenderTarget( (ISourceVirtualReality::VREye)(m_eStereoEye-1), ISourceVirtualReality::RT_Color );
		pRTDepth = g_pSourceVR->GetRenderTarget( (ISourceVirtualReality::VREye)(m_eStereoEye-1), ISourceVirtualReality::RT_Depth );
	}

	DrawInternal(VIEW_3DSKY, true, pRTColor, pRTDepth );
}

Desktop.2026.05.05.-.06.13.45.02.mp4

[Akabenko]

Seems INTZ kill MSAA

[HyperionCoding]

What's the motivation for this?

[Akabenko]

What's the motivation for this?

This allow to get depth buffer without second render of scene like as do Resolved Depth Buffer in SSAO_DepthPass function. This can be useful for modders on Source SDK 2013 for deferred renderer. Thats why INTZ kill MSAA.

https://www.dmitrex.com/publications/Enhancing%20the%20looks%20of%20Source%20Engine%20in%20Military%20Conflict%20Vietnam.pdf

[neobenedict]

Just change the pyrovision check instead so SSAO_DepthPass always runs if there's something in the scene that needs it. Instead of hardcoding to only have pyrovision on?

[Akabenko]

But its not a SSAO_DepthPass. INTZ depth is cheaper to get, than Resolved Depth.

[neobenedict]

I know, I was suggesting since the feature's already implemented, it could be made more "available", which is potentially a lower bar to clear than this.

Also it's only 8-bit in the red buffer, other channels should be used to encode more data...

[Akabenko]

@neobenedict you can run GetRenderTargetEx in view.cpp void CViewRender::Init( void ) for _rt_ResolvedFullFrameDepth with IMAGE_FORMAT_R32F. And then your depth will be as 32 bit. Then use it as depth * 4000 = projPosW in shaders. or as 1/depth/4000 as depth in range 0...1

[Akabenko]

We can modify DepthWrite to writes WorldNormals in other channels, but here no Normals info in meshes in Brushes. Its as optimization of render of shadow maps and ssao depth pass. U can get Normals of props and reconstruct Normals for World.

So you can get normals from Models and make 3Tap reconstruction for world.