Issue with sampling input radial or equirectangular map

[remcohuijser]

Very nice tool Matt!

I just wanted to point out something I found. Not sure if you find this valuable.

When using a radial or equirectangular map the result did not look right as can be seen below:

After replacing the function texSpherical in IblEnvironmentSphereSpherical.fx and IblSinglePassSphericalEnvironment.fx with "proper" sampling code the results looked much better :)

float4 texSpherical(float3 dir, float lod)
{
	float3 normalizedDir = normalize(dir);

	float lon = atan2(-normalizedDir.z, normalizedDir.x);
	float lat = acos(normalizedDir.y);
	
	float2 radians = float2(1.0 / (3.141592 * 2.0), 1.0 / 3.141592);
	
	float2 uv = float2(lon, lat) * radians;
	
	return environmentMap.SampleLevel(anisotropicSampler, uv, lod);
}

[derkreature]

Can you make a pull request. Looks good!

[remcohuijser]

I am very short on time right now but will try to get something done soon :)

[derkreature]

No problem, I’ll test and modify.

[derkreature]

I am getting to this.