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com_fixedtic -1 causes Imp fireball and Lost Soul trail effect to render incorrectly

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shoober420 opened this issue Nov 3, 2019 · 3 comments

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@shoober420
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shoober420 commented Nov 3, 2019

When using com_fixedtic -1, the Imp fireball smoke effect and Lost Soul smoke trail when it flys toward you renders incorrectly. It causes weird graphical corruption with shadows in the air. Very odd. I’ll post my specs below.

OS : Arch Linux 64bit (Testing Repository)

--- Kernel : 5.3.8-zen+
--- File System : ext4
--- Shell : zsh
--- Display Server : X.Org 1.20.5
--- Window Manager : bspwm
--- Terminal Emulator : st-scrollback (fg: #00ff7f) (bg: #000000)
--- Font : IBM Plex Mono
--- File Manager : cd, cp, rm, ls, ln
--- Text Editor : vim
--- Task Manager : htop
--- Audio Player : cmus
--- Video Player : mpv
--- Image Viewer : sxiv
--- Video Editor : avidemux
--- Raster Graphics Editor : azpainter
--- IRC Client : weechat
--- Disc Burner : libburn
--- Web Browser : Chrome Dev
--- Steam Client Beta

Case : Cooler Master Elite 310 (Noctua Fans)
Motherboard : ASUS P5QL
PSU : Corsair CX750M
CPU : Intel Core2Quad Q9650 @3.8GHz
GPU : NVIDIA GeForce GTX 760 2GB (440.26)
SPU : ASUS Xonar Essence STX
RAM : 8GBs DDR2 800MHz
NIC : Intel Gigabit CT Desktop Adapter
Mouse : Microsoft Intellimouse Explorer 3.0 @500hz (Zowie P-SR)
Monitor : IBM P275 CRT
Keyboard : SteelSeries 6Gv2 PS/2 (Cherry MX Red)
Headphones : Grado Prestige SR80e

@shoober420
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shoober420 commented Nov 3, 2019

Carmacks reverse and StencilOpSeparate, whether they are on or off, have no effect. The issue still remains.

@DanielGibson
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DanielGibson commented Nov 3, 2019

Yeah, I think the trick is to set com_fixedTic back to 0 :-P

At what refreshrate did you play?

#248 (comment) also mentions problems (flickering particles; maybe the same as yours?) with com_fixedTic -1

#230 is also about problems with >60Hz or com_fixedTic -1 and mentions some of the technical difficulties - I guess this should just be considered broken right now until we (hopefully) have proper support for that.
Problem is, I currently neither have time nor a non-60Hz-display, so I can't do it myself..

@shoober420
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shoober420 commented Nov 4, 2019

I was playing at 75Hz and 2048x1536 resolution. I just tried using 60Hz, but the smoke effect is still rendered incorrectly.

I then tried 640x480 with 170Hz, and the bug is still present. Smoke effects are rendered buggy when using -1 setting. When set to 0, it’s normal.

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