I think this is related to the new player models, unsure
I tried all the render modes and none of them work ( sv_disable_immunity_alpha = 1 )
PHP Code:
enum RenderMode
{
RENDER_NORMAL, /**< src */
RENDER_TRANSCOLOR, /**< c*a+dest*(1-a) */
RENDER_TRANSTEXTURE, /**< src*a+dest*(1-a) */
RENDER_GLOW, /**< src*a+dest -- No Z buffer checks -- Fixed size in screen space */
RENDER_TRANSALPHA, /**< src*srca+dest*(1-srca) */
RENDER_TRANSADD, /**< src*a+dest */
RENDER_ENVIRONMENTAL, /**< not drawn, used for environmental effects */
RENDER_TRANSADDFRAMEBLEND, /**< use a fractional frame value to blend between animation frames */
RENDER_TRANSALPHAADD, /**< src + dest*(1-a) */
RENDER_WORLDGLOW, /**< Same as kRenderGlow but not fixed size in screen space */
RENDER_NONE /**< Don't render. */
};