[0.4.5] [Blood] Some textures flicker

[Manuel-K]

(…) for unknown reasons!

Maybe a case of “we've always done it that way”?

[axredneck]

AFAIK Build's software render doesn't use depth buffer at all so it doesn't have this glitch, right? (But has another glitches for this reason)

[Graf Zahl]

Precisely. But it's a software renderer!

[axredneck]

Is it possible to not use depth buffer in Polymost too and to do sorting the way Software does?

[Graf Zahl]

No, that won't work. And even if it was you could forget about any kind of advanced effect.

[sinisterseed]

I'm already using that - the problem lies elsewhere. IIRC Build works by rotating the wall sprite into the proper orientation with its crude fixed point trig functions and those are wayyy to imprecise. But it's hard to change because too much math is done in fixed point instead of converting to float as soon as possible and use higher precision math. Last year some already existing float math was even converted back to fixed point for unknown reasons!

... they've gone backwards? Why?

[Graf Zahl]

Don't ask me. The comment came without any explanation.

[markanini]

Don't ask me. The comment came without any explanation.

Someone went to far copying the style of the original code...

[mjr4077au]

To the OP, any chance you could validate whether this issue still occurs for you on the current master? There's been significant backend changes since this was first reported.

[Graf Zahl]

The texture flickering is a core problem of how Polymost sets up attached wall sprites. To fully resolve this these need to be done differently, but that requires a true 3D renderer which Polymost isn't.

[mjr4077au]

Ahh yep, no problems thanks for reminding me

[sinisterseed]

May not be fully fixed for sure, but the backend changes definitely improved this, magically or otherwise.

I've not had flickering wallsprites since.

[CBM]

blood has some voxels that flicker, but that is the voxel itself that is of low quality.
About half the voxels in shadow warrior and blood are.... not of a particular high quality.

[markanini]

It still happens in different spots. For example in the cultist room in Blood E1M3 the window shades disappear at some some angles. Similarly in Shadow Warrior Level 2: Zilla Construction the button on the side of the toilet disappears depending on the angle.

[sinisterseed]

Similarly in Shadow Warrior Level 2: Zilla Construction the button on the side of the toilet disappears depending on the angle.

This is unrelated I think.

I've noticed key panels do this as well depending on angle and position, so I think this is really just Polymost being Polymost. The original flickering issues are surely gone now. I'll see what happens on that map in Blood, don't recall seeing anything like this.