> ## Name

> tex3Dlod - 3D texture lookup with specified level of detail and optional texel offset.

> ## Synopsis

>     float4 tex3Dlod(sampler3D samp, float4 s)
>     float4 tex3Dlod(sampler3D samp, float4 s, int texelOff)

>     int4 tex3Dlod(isampler3D samp, float4 s)
>     int4 tex3Dlod(isampler3D samp, float4 s, int texelOff)

>     unsigned int4 tex3Dlod(usampler3D samp, float4 s)
>     unsgined int4 tex3Dlod(usampler3D samp, float4 s, int texelOff)

> ## Parameters

> samp
>   Sampler to lookup.
> s.xyz
>   Coordinates to perform the lookup.
> s.w
>   Level of detail.
> texelOff
>   Offset to be added to obtain the final texel.

> ## Description

> Performs a texture lookup with a specified level of detail in sampler samp using coordinates s.

> ## Profile Support

> tex3Dlod is supported in fragment profiles starting with fp40 and in vertex profiles starting with vp40. Variants with texelOff are only supported in gp4 and newer profiles. Variants with integer samplers are also only suppported in gp4 and newer profiles.

> ## See Also

> tex3D, tex3Dbias