PGXP Graphics Issues

[subvitte]

If I activate PGXP (memory only) it produces breaks in the map. This happens with all 3D games I've tried (Gran Turismo, Spyro, etc.)

Tested in Retroarch 1.8.4 witch Vulkan and OpenGL. Windows 10 x64. Nvidia GTX770.

Renderer: OpenGL (also Vulkan) Software Framebuffer: On Adaptive Smoothing: Off Internal GPU Resolution: 8x (also 1x) Texture filtering: nearest Internal Color depth: 32bpp Wireframe Mode: Off Display Full VRAM: Off PGXP operation mode: Memory only PGXP vertex cache: Off PGXP perspective correct texturing: On (the others parameters all default)

[aktau]

This also happens on Linux (Debian Bullseye, Intel Gen7, Vulkan).

Beetle PSX commit c7c8ffd3d2cf1c780ccf98417e60908f9adf970d.

Common options to all tests:

Option	Value
CPU Dynarec	Disabled (Beetle Interpreter)
MSAA	1x
Texture Filtering	Nearest
Dithering pattern	OFF
Internal GPU Resolution	4x (but doesn't matter, they appear on all resolutions

No gaps:

Option	Value
PXGP Operation Mode	OFF
PXGP Vertex Cache	OFF
PXGP Perspective Correct Texturing	OFF

Mild flickering gaps (this really also happens when PXGP Operation Mode is set to off, despite the documentation claiming that the PGXP Vertex Cache value is not respected if PXGP Operation Mode is not enabled. This at least is a documentation bug):

Option	Value
PXGP Operation Mode	OFF or MEMORY_ONLY (similar result)
PXGP Vertex Cache	ON
PXGP Perspective Correct Texturing	OFF

Slightly wider, persistent gaps (this is unexpected, MEMORY_ONLY + Vertex Cache ON is better than MEMORY_ONLY and Vertex Cache OFF. Enabling each one individually is bad but their badness does not seem to combine, and in fact MEMORY_ONLY but Vertex Cache ON is better than just MEMORY_ONLY).

Option	Value
PXGP Operation Mode	MEMORY_ONLY
PXGP Vertex Cache	OFF
PXGP Perspective Correct Texturing	OFF

Heavy, wide gaps (not always the same locations as the previous section):

Option	Value
PXGP Operation Mode	MEMORY_ONLY
PXGP Vertex Cache	OFF
PXGP Perspective Correct Texturing	ON

No gaps (as expected because the docs state that Perspective Correct Texturing depends on PXGP operation mode not being OFF:

Option	Value
PXGP Operation Mode	OFF
PXGP Vertex Cache	OFF
PXGP Perspective Correct Texturing	ON

[subvitte]

This also happens on Linux (Debian Bullseye, Intel Gen7, Vulkan).

I've tried PGXP + Vertex Cache, but it produces artifacts in graphics. Is there any solution to the problem?

[lmills87]

I seem to get similar behavior in Metal Gear Solid, in addition to clipping through the map boundaries (more severely when memory+CPU is enabled compared to just memory).

[Sanaki]

This may have been fixed by PGXP Primitive Culling. Worth rechecking.