0005063: ModelFragProg.glsl writes to deferred buffers even if the fragment is fully transparent.

ID	Project	Category	View Status	Date Submitted	Last Update
0005063	Spring engine	General	public	2016-02-07 16:09	2016-02-07 22:15

Reporter	Beherith	Assigned To	Kloot
Priority	normal	Severity	tweak	Reproducibility	always
Status	closed	Resolution	no change required
Product Version	100.0+git

Summary	0005063: ModelFragProg.glsl writes to deferred buffers even if the fragment is fully transparent.
Description	The deferred buffers are written to even if a fragment is transparent. Maybe just an early [ if (extraColor.a < 0.5) discard; ] is sufficient, but I see that there have been some alpha pass changes in the shader code, and am unsure if i'm not breaking some intended functionality with this.
Steps To Reproduce	Requires deferred buffer visualiaztion, and a unit with alpha transparency. For this, I used some trees and BAR's deferred lighting shader. See the attached screenshot for details.
Tags	No tags attached.
Attached Files	~~screen00141.jpg~~ (Attachment missing)

Checked infolog.txt for Errors

Date Modified	Username	Field	Change
2016-02-07 16:09	Beherith	New Issue
2016-02-07 16:09	Beherith	File Added: screen00141.jpg
2016-02-07 21:09	Kloot	Note Added: 0015644
2016-02-07 21:09	Kloot	Note Edited: 0015644
2016-02-07 22:15	Kloot	Status	new => closed
2016-02-07 22:15	Kloot	Assigned To	=> Kloot
2016-02-07 22:15	Kloot	Resolution	open => no change required

Kloot 2016-02-07 21:09 developer ~0015644 Last edited: 2016-02-07 21:09	extraColor is written to the SPECTEX buffer, so you can kill the lighting for those fragments by multiplying with float(SPECTEX.a > 0.0) on the deferred side (a branch would hurt more than writing the fragment does).