Question by archelyte_vz · Nov 01, 2018 at 05:13 AM · camera texture view first-person distortion

First Person Camera Distortion Problem

The first person camera is distorting surfaces when I get too close to them. I have not messed with the FOV settings, it is currently set to 60.

I need the texture to be totally flat and undistorted by the camera, as the player will spend a lot of time climbing surfaces.

This is what it looks like: alt text

distortion.png (511.6 kB)

Add comment · Show 9

Eno-Khaon · Nov 01, 2018 at 06:22 AM 1

It's tough to tell exactly what I'm looking at there. However, I still have a thought regarding what the problem may be.

While experimenting with screen-space texturing on an uneven surface, I've found that calculating ALL of the screen-space uv coordinates entirely in the vertex shader often lead to distorted interpolation when transferred over to the fragment shader while viewed from extremely close up. It was a shame to transfer those calculations to the fragment shader, but it immediately cleared up all of the distortion I was seeing in that situation.

archelyte_vz Eno-Khaon · Nov 01, 2018 at 04:32 PM 0

I'm very unfamiliar with shader coding. The texture is using the default shader, so what do I need to change in the code, exactly?

SunnyChow · Nov 01, 2018 at 08:39 AM 0

what does the texture original looks like? what shader are you using?

archelyte_vz SunnyChow · Nov 01, 2018 at 04:35 PM 0

The original texture looks like this:
alt text

I'm using unity's standard opaque shader.

5f21d144-9da7-4d16-a585-ce72d24dc5a1-scaled.jpg (122.1 kB)

Eno-Khaon archelyte_vz · Nov 01, 2018 at 11:28 PM 0

Is that texture specifically what we're seeing in the original image, or is that a reflection in the original image?

Jordash · Nov 02, 2018 at 02:10 AM 1

This looks like a problem with parallax/height map. Does your mesh have tangents built correctly? And how close are you to the surface? Even in an fps there should be a distance between the camera and a surface

archelyte_vz Jordash · Nov 02, 2018 at 03:25 PM 0

That is exactly what the problem is, actually. I disabled the height map, and the issue disappeared. The problem now is that the texture looks very flat.

As far as distance, the character is scaling a rock face with uneven surfaces, so it's unavoidable that the camera will make unintentional contact with some of those surfaces.

Jordash archelyte_vz · Nov 03, 2018 at 02:19 AM 0

Glad I could help! Have a look at some AAA fps games and you'll see you can't get right up close to a wall, put this limit in and you should be able to use height maps without distortion.