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Relaxed Cone Step Mapping?
Hi, I am part of a group of students developing their final end of the course project. I am sitting on the art side of the fence but have a hinge to the technical and want to get into shader programming. I decided to look into parallax mapping and found out about something called "relaxed cone step mapping"… -
Re: Relaxed Cone Step Mapping?
Right, you don't need to necessarily have a pixel = vert ration depending on the image content, but in a situation where you don't have pixel level detail you could just use a smaller texture too. The bigger point I want to make is that displacement is a poor option for high frequency detail, that is much better done with… -
Re: Relaxed Cone Step Mapping?
Thank you Ace-Angel for elaborating. Very interesting arguments you guys brought to the table. They talk about anti-aliasing issues in Section 18.1 of the Gpu Gems article and show some comparison pictures which look quite promising, however it's a rather small image so it is hard to judge and I have not yet seen an actual… -
Re: Relaxed Cone Step Mapping?
Pixel shaders are already being oversaturated, so parallax mapping has been largely abandoned in favor of tessellation which is also capable of altering the objects silhouette and acting like a dynamic LOD system in some situations. -
Re: Relaxed Cone Step Mapping?
Displacement is NOT a replacement for normal maps for a variety of reasons. You still need those per-pixel normals for accurate shading. To replace normal maps with realtime displacement you need: A. Insane levels of subdivision to get to the pixel-level, to replicate the same detail as a 1Kx1K normal map you need 1048576… -
Re: Relaxed Cone Step Mapping?
It really depends what technique you use, which I think is the point of bringing up RCSM as a method. By bringing up pancaking I think you're thinking of POM shortcomings. There are tons of ways to fake depth, some expensive some cheap, and I think it's (currently) better to keep those options in mind than to just… -
Re: Relaxed Cone Step Mapping?
This is what I'm referring to and it is part of why I think tessellation is premature. In the most extreme situation where there is no type of interpolation sure you could probably imagine it like that, but high screen resolution is 1080p every point on a normal map doesn't necessarily represent a vert, represents values… -
Re: Relaxed Cone Step Mapping?
No, there really isn't, PP-Mapping is fancy, sure, but it's useless, I would say if you want to show of your 'leet' skills, that is totally different matter at hand, but at it's core, PP-Mapping doesn't have the magical properties many claim for it to have. Lets look at a few things shall we? -Fake depth -Fake silhouette… -
Re: Relaxed Cone Step Mapping?
Tessellation still has a slew of problems and is, in practice, pretty much exclusive to certain cards and settings (minority of players). IMO There's still plenty of room for faking depth in the shader, and the techniques don't necessarily have to be too expensive for every asset (often just UV tricks). I don't have much… -
Re: Relaxed Cone Step Mapping?
Well put, this thought was the tie breaker for me
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