Marcin Ignac

Expected  Actual  Caused by [normal flipping](https://github.com/pex-gl/pex-renderer/blob/master/shaders/pipeline/material.frag.js#L130) with a gltf geometry that has `doubleSided: true` ``` data.normalView *= float(gl_FrontFacing)...

Generated screenshots have floor on top of everything   Examples themselves work fine though?!

E.g. this example http://localhost:8081/?name=gltf

Shadow mapping breaks after 2 minutes

2

 What i discovered so far: The code responsible is in [directional light shadowmap update](https://github.com/pex-gl/pex-renderer/blob/master/index.js#L167) ```javascript const sceneBboxInLightSpace = aabb.fromPoints(bboxPointsInLightSpace) const lightNear = -sceneBboxInLightSpace[1][2] const...

In lights example

Custom frag shader throws an error

2

`Error: Program: ERROR: Input of fragment shader 'vNormalWorld' not written by vertex shader ERROR:` Is it because we reuse that material in depth prepass?

Dragging orbiter fast rotates backwards

4

Dragging orbiter fast e.g. from right to left makes camera jump backwards before continuing rotation CW.

It works fine on iPhone 7. Switching back to `highp` in the fragment shader fixes the issue. Mozilla actually recommends avoiding mediump if possible https://developer.mozilla.org/en-US/docs/Web/API/WebGL_API/WebGL_best_practices

Shader compilation errors are swallowed

3

I believe it was introduced so the pex-nodes gui doesn't crash on shader recompilation.. We return "renderer red color" shader when compilation fails: https://github.com/pex-gl/pex-renderer/blob/master/index.js#L361