Your thoughts on and comments to Volume Rendering in Unreal Engine 4.

[Kakushi_52]

@tommybazar

But yeah, if you create a texture as an INT texture somewhere in code, then you can read from it in materials like this:

int LabelValue = asint(VolumeTexture.Load(int4(CurPos, 0)));

same with asuint();

Try putting that in a custom node and returning it, should convert the int to a float and make it useable further down the road.

note - int4(pos, 0) is for volume textures, 2D will have int3(pos, 0).

Hope this helps somebody, because I wasted way too much time on this

Thank you so much for your kind reply! I did not know that singed or unsigned int texture is not interpolated…
However, most of the CT or MRI images are composed of singed integer scalar values, so requesting Unreal Engine to support DXGI_FORMAT_R16_SNORM in addition to DXGI_FORMAT_R16_UNORM (PF_G16) would be the best way?
Otherwise, shifting the signed integer value to unsigned integer value inside the code like what I did, is the only solution?