parallax mapping Fstorm

[Sharlybg]

Don't know if you ever seen this but this Fstorm mapping features is awesome :

Parallax bump:

Parallax bump combines displacement quality, bump mapping speed and interactivity. It is a 3d effect on flat surface like a hologram. Parallax bump can use any kind of textures, works on shader level, doesn't require geometry recompilation and has almost the same speed as normal bump. It is great addition to achieve more details and realism for almost no cost.

[lacilaci]

I saw this, it's fantastic... But very likely not going to work with bidir

[Sharlybg]

I saw this, it's fantastic... But very likely not going to work with bidir

Bidir isn't often used so it is not a lost

[lacilaci]

I saw this, it's fantastic... But very likely not going to work with bidir

Bidir isn't often used so it is not a lost

Don't get me wrong.. I don't care about bidir at all and there are a lot of features that would be much more beneficial than bidir and that probably cannot be used with bidir (like rayswitching)

I wonder how this parallax mapping would work for lighttracing though. Imagine water ripples done by parallax bump, how would lightrays see it to cast proper caustics? But maybe having an info about the feature not working with lighttracing could be good enough.

[B.Y.O.B.]

The problem is, if you say "I don't care about Bidir", you also say "I don't care about PhotonGI and Light Tracing", because they are also variants of forward raytracing (bidir is forward + backwards raytracing, while the Path engine itself does only backwards raytracing).

[Sharlybg]

"I don't care about PhotonGI and Light Tracing"

PGI + LT no no no no i care don't touch my babies

[lacilaci]

The problem is, if you say "I don't care about Bidir", you also say "I don't care about PhotonGI and Light Tracing", because they are also variants of forward raytracing (bidir is forward + backwards raytracing, while the Path engine itself does only backwards raytracing).

Ok, but if a feature isn't supported by photongi/lighttracing (For example parallax bump would be visible only as normal bump by for lighttracing) you still get proper results from pathtracing and added lighttracing on top of that.

But bidir would mess up results cause they would be mixed, making it so that the feature literally breaks rendering, no?

So, if I understand this correctly. A feature that only works in pathtracing does not necessarily mean it breaks lighttracing as long as there is a workaround in the lighttracing. But this is not doable for bidir.

Am I not understanding this properly?

[Dade]

Am I not understanding this properly?

But is it something based on a published paper ? Otherwise it is simply unknown how it works

[lacilaci]

Am I not understanding this properly?

But is it something based on a published paper ? Otherwise it is simply unknown how it works

Yeah well there is some sort of auto conversion of bump map to parallax. But how it works.. I have no idea

[Racleborg]

PGI + LT no no no no i care don't touch my babies

...and ditto