Optimized POM effects

[Rabbit0w0]

Some refactor for better performance. Details can be found in the code comments.

Just tryin' to help out <3

[EminGT]

Oh wow this looks massive! Thank you so much for your contribution. I'll do some testing and hopefully implement this in the next update if no weird driver issues are found (as we get a lot of those random hardware specific driver issues on pom code :P)

[Rabbit0w0]

Sry I didn;t expect such a quick response but this PR is still WIP. I'm still working to mitigate some visual changes introduced by this PR. I will speed up so you will be able to test it out in a short time.

[EminGT]

Oh that's completely okay you can take as long as you want. I really appreciate your care about this :)

[Rabbit0w0]

It should be okay now!

[Rabbit0w0]

Tested on following GPUs:

• Vega 8
• GTX 1060
• RTX 3060
• RTX 5070

[EminGT]

I'm unfortunately seeing some artifacts. First shot is with this PR

[Rabbit0w0]

Maybe I should make the pallax shadow non-wrapping too. I will try to fix this once I get back to work. And thanks for your time.

[EminGT]

Thank you for your care I really appreciate it :)

[Rabbit0w0]

I made some changes which were intended to fix the issue you mentioned. Could you please take a look?

[EminGT]

This is unfortunately just giving me compile errors now. I tested with two different GPU brands in case it was a driver difference issue.

Nvidia GPU:
0(1083) : error C1503: undefined variable "TileEpsilon"
0(1090) : error C1503: undefined variable "AtlasClamp"
0(1158) : error C1503: undefined variable "TileEpsilon"

AMD GPU:
ERROR: 0:1083: 'TileEpsilon' : no matching overloaded function found
ERROR: 0:1083: '=' : cannot convert from ' const float' to ' temp 2-component vector of float'
ERROR: 0:1083: '' : compilation terminated

[Rabbit0w0]

Sry I just realized that I committed a wrong version.

[EminGT]

Unfortunately now I'm seeing that the shadowing seems to be much less visible than before, and a second problem is that the performance doesn't seem better than default Complementary. (108 fps on default, 102 fps with latest pr)